Switch to new Microsoft.DotNet.SharedFramework.Sdk and refactor Host/Installer build subsets (#38457)

* Start creating runtime, apphost, and targeting packs using the new SDK in the NewSFX subset.

* Fix generation of runtime package, runtime symbols package, and host symbols package.

* Correcly include hosting files and DIA in the shared framework archives and packages

* Include PackageOverrides.txt in the ref pack.

* Fix product brand prefix.

* Add the shared host installer.

* Add the hostfxr build and clean up MacOS building.

* Rename host and hostfxr projects to ensure we don't collide with the nuget packaging projects.

* Add bundle installer.

* Update platform manifest entries to include linux/mac file variations from the runtime.

* Update apphost pack to match master.

* Fix typo

* Include manpages and fix linux package properties.

* Fix linux package properties.

* Match short-description from packages in master.

* Update to uploaded package.

* Update metadata and SDK to generate an exact match of the productbuild xml file.

* First draft moving crossgen2 to new SDK.

* Get crossgen2 pack working with updated SDK.

* Build archives from the installer and bundle projects.

* Move the dotnet-runtime-deps installers to use the new SDK.

* Rough attempt to convert the build to use the new sfx sdk.

* Remove now empty subsets.

* Update installer subsets for testing.

* Remove non-existent packaging project from subsets.

* Add missing Windows api shim dll to platform manifest.

* Update sharedfx sdk.

* Add both versions of the long-name dac to the platform manifest.

* Skip builds for non-relevant components on Mono.

* Remove installer tests by default temporarily to validate product build.

* Remove pkgprojs subset from mono installer build since it doesn't build the hosts.

* Skip the apphost pack on mono.

* Update host test infra to use the new sfx projects.

* Delete an out of date test (the alternative case this test exercises is now the only case in this repo)

* Fix packaging tests and remove NETStandard packaging tests since we aren't producing that ref pack any more.

* Fixes for test official build failures. Re-eneable installer tests by default.

* Fix condition for building linux installers.

* Exclude Mono header files from the deps.json. They don't need to be in it.

* Don't include the host files on the sfxproj.

* Add mono-specific files to the platform manifest.

* Remove extra copy step in installer job.

* Include libmonosgen-2.0.a in platform manifest.

* Fix change in linux-x64 test steps.

* Fix display name of linux package steps.

* Build the installers based on the portable build when applicable so they can find their artifacts.

* The installer build no longer consumes Microsoft.NETCore.Platforms and Microsoft.NETCore.Targets, try removing the dependency on the AllConfigurations leg from the installer build.

* Set PackageBrandNameSuffix for runtime-deps packages.

* Updated sharedfx sdk

* Fix debian runtime-deps dependency elements.

* Add new platform manifest entries.

* Add icudt.dat to the platform manifest.

* Invert conditions to correctly skip generating installers on non-applicable platforms.

* Create extra installer subset so we can build just the installers (and avoid double-building nuget packages). Rename the newsfx subset and folder to sfx.

* Fix Crossgen2 package name.

* Clean up some dead MSBuild goo and update the sharedfx package so we can override the crossgen2 package name without breaking the default package id logic.

* Update SharedFX SDK.

* Fix discovery of the built dotnet layout for installer tests. Clean up some MSBuild along this path.

* Update to use the new refactored packages.

* Fix macOS build failures.

* Fix linux installer build.

* Upgrade to newest version of the SDK and centrally manage versions.

* Update SDK to fix build skipping for the shared framework sdk.

* Update SDK with full fix for skipbuild with packaging.

* Another try for fixing the build-skip infra.

* Upgrade SDK.

* Fix package ids for mono packages.

* Fix installer tests after update.

* Add System.Private.Runtime.InteropServices.Javascript.dll to platform manifest

* Fix Crossgen2 package to place all files in the tools folder.

* Update to SDK with validation targets.

* Add new ICU files to manifest.

* Crossgen2 doesn't need to go through framework resolution so we can permit non-file-versioned dlls. (jitinterface.dll is currently unversioned).
Signed-off-by: NJeremy Koritzinsky <jekoritz@microsoft.com>

* Put the property in a property group.

* Ensure we build corehost before sfx since we no longer directly build the project from the sfx projects.

* Add missing entry for additional ICU data file.

* Remove step downloading all artifacts and remove MSBuild glue to hook up looking up artifacts in the full download.
Signed-off-by: NJeremy Koritzinsky <jekoritz@microsoft.com>

* Update SDK
Signed-off-by: NJeremy Koritzinsky <jekoritz@microsoft.com>

* Update SDK to get MSI fix.
Signed-off-by: NJeremy Koritzinsky <jekoritz@microsoft.com>

* Don't even try building the hosting, crossgen2, or bundle installers when RuntimeFlavor is Mono.

* Remove out of date comment.
Signed-off-by: NJeremy Koritzinsky <jekoritz@microsoft.com>

* Rename subsets based on PR discussion.

* Update platform manifest and fix path to 3rd party notices for installer.

* Remove test feed.

* Update subset references I missed.

* Fixed the subset arguments in other yaml files.

* Add NuGet metadata to packs.

* Add diagnostics-specific incremental signing in CoreCLR when the files are produced so the installer portion doesn't need to sign them.

* Pass sign type to job.

* Add new WASM files.

* Enable static graph restore for the whole repo

* Fix nits

* Add back the runtime-deps packages. They were lost when we moved away from globs.

* Don't disable NuGet static graph restore.

* Make sure we sign the cross-arch same-os DAC

* Update installers package.

* Update Installers package from arcade

* Update installers package.
Co-authored-by: NViktor Hofer <viktor.hofer@microsoft.com>