Make sure TLS 1.2 is used to fetch from https://dot.net

Fix rename with F# projects referencing C# projects

https://github.com/dotnet/announcements/issues/77 for the change and
where I am stealing this change from.

If we are doing a rename from a C#/VB symbol, and an F# project depends
on that project, we might end up walking into non-C#/VB projects and
we will crash. This prevents the crash.

There were two ways I could fix this bug: one would be to update
GetDocumentsAffectedByRename to exclude them up front. The other option
is to deal with those at the call sites when we fail to find a service.
I'm electing to do the later as that allows light-up by the appropriate
language services if they wanted to do that down the road.

AddNonSubmissionDependentProjectsAsync is designed to return projects
that depend on a given symbol. It indirectly calls HasReferenceTo
which in the metadata paths will only return projects that have
Compilation support. Thus, it seems safe to exclude the projects
entirely.

Fixes dotnet/roslyn#25655.

Fix windows_loc_changes leg

When I created the windows_loc_changes job for Jenkins I thought the
`GIT_BRANCH` environment variable contained the name of the branch a
change would be merged into. Instead, it contains the name of the
"head" branch, which is not helpful for this purpose. I have not yet
been able to identify an environment variable that has the name of the
"base" branch instead.

As a workaround, this commit updates netci.groovy to capture the branch
name when the job is generated.

Add a Jenkins leg to check for loc changes

Fix InternalsVisibleToCompletionProvider showing unsupported project types

Add a Jenkins leg to check for loc changes. Once we're past the loc
freeze date for a release branch we want to block any PRs that modify
.xlf files.

Note that we *do* need a way to let updates from the Loc team through,
but that is not addressed by this change.

When we enabled pointer_element_access to work on fixed sized buffers
regardless of the movability of the receiver of the buffer access, we
did not repair the safety rules to prevent leaking a pointer to a
moveable variable back into the language.

This change adds a new rule, which makes the movability of a
pointer_element_access on a fixed size buffer dependent on the
movability of its receiver. This should require the use of a `fixed`
statement to prevent safety holes.

Fixes #28476

Set VSSDKTargetPlatformRegRootSuffix for Roslyn.csproj

Use a 75 minute test timeout on CI

Closes #28410

* Add telemetry for infobar selections

* Add telemetry for Tools options settings related to code cleanup

* Fix telemetry logging

* Add telemetry when infobar is displayed

* added log that can be used for perf investigation

* Respond to feedback

* Fix merge conflicts

* Respond to feedback

* Move logger block

* Move logger block

* Respond to feedback

* Respond to feedback

Don't ensure we have a FileChangeTracker until we actually read the file

Report progress for the actions we're talking while doing code-cleanup.

Fix NRE when handling multiline documentation comments in C#

* Fix discard symbol for declaration pattern

* Remove unnecessary cast

basically this Solution/DocumentBranch strongly holding onto next State causes
old roslyn snapshot to make every snapshot after it to stay in memory.

or worse, it causes a lot of forked solution to be left alive in memory until
certain snapshot goes away.

we will first try to simply get rid of this optimization and see whether we can observe
impact on RPS.

if it somehow shows up, we will change it to weak reference rather than strongly hold onto it

Use default constant value for synthesized local reference for LockTa…

* use correct line ending

* ported https://github.com/mono/monodevelop/pull/5335/files

Fix generating types into an existing file

* Break 'remove unnecessary this/me' into it's own analyzer+codefixer.

* Share code.

* Simplify.

* Simplify code.

* Simplify.

* Add comment.

* Inline method.

* Revert accessibility

* Update tests.

* Move tests.

* Make all edits at once.

* Move files.

* Simplify

make code cleanup run in-proc

add PerformAdditionalCodeCleanupDuringFormattingCheckBox

This .EnsureSubscription() was very premature.

This version includes now required `signers` entry to Willow package manifest.

Fallback navigate to

Merge dev15.8-preview4 to dev15.8.x

Merge dev15.8-preview4 to dev15.8.x