Remove inaccessible attributes when generating code

Show nullable annotations in tuple signature help

Update Generate Equals and GetHashCode to handle nullable members

Do not fade code for IDE0016 (UseThrowExpressionDiagnosticId)

Revert test workarounds/skip for IDE diagnostic configuration code fixes

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19419.12

Most of the tests in here still hard code older baselines because they
predate some pattern matching improvements, but this is fully new.

Fixes https://github.com/dotnet/roslyn/issues/37913

Fix generated Equals(object) parameter nullability mismatch

Fixes https://github.com/dotnet/roslyn/issues/37252

Remove RuntimeIdentifiers

Disabling Mono leg

Latest Mono nightly builds appear to have broken serialization during
remoting across AppDomain instances. That is pretty fundamental to how
we test. Temporarily disabling the Mono leg until this can be fixed.

Tracking Mono Issue: https://github.com/mono/mono/issues/16373

If you forget to wrap something in a <Document> then this can flag
where you did that.

Also add a few more places where we need to wrap symbols.

It turns out for methods we already had
RemoveInaccessibleAttributesAndAttributesOfTypes but had accidentally
created another helper for filtering out attributes from parameters
that more correctly should have used that. This also observed that we
didn't have a helper for IParameterSymbols to do the same thing.
We did have one that filtered but not one that removed innaccessible
parameters, which was actually a bug.

We had a helper for 'create an IMethodSymbol with certain changes', but
it didn't have quite enough that we could use it in more places. Also
inline it into the single caller.

Convert Get/Set property fixed to handle nullability

If you write a test to assert a code fix works, and you don't get a
code fix, sometimes that's because the code fix is broken. Sometimes
it's just because you have a silly typo in your test that means the
test workspace isn't doing what you think. To aid in debugging those,
add some extra test support to dump diagnostics in that case.

Update override completion for nullable reference support

The `$(RuntimeIdentifiers)` property was added some time ago to support
scenarios like self contained in our infrastructure. That is no longer
done during build and this property is no longer necessary. Further it's
causing us additional restore time to bring down runtimes we don't need.

Fixes #27213

Analyzer recommends using throw expression for null checks instead of throw statement within an if statement with null check. We used to fade the entire if statement for discoverability and increased code fix span, but this was undesirable as we want to fade only unnecessary or dead code. This change removes the fading diagnostic and updates unit tests accordingly

This reverts commit ed6a2b81.

Move to a new Windows pool

Convert To Interpolated Strings refactoring provider should treat cha…

Show code instead of designer if the designer is not installed

Replace obsolete vbNewLine

Fixes #27213

Analyzer recommends using throw expression for null checks instead of throw statement within an if statement with null check. We used to fade the entire if statement for discoverability and increased code fix span, but this was undesirable as we want to fade only unnecessary or dead code. Instead, we now generate a hidden non-configurable fixable diagnostic for the increased code fix span and do not generate any fading.

Command line compilation is fixed to avoid writing any files to disk when compilation
fails. The Emit API is changed to not write the PE file when compilation fails, but the
behavior where the XML doc comments are still written is preserved.

Fixes #37779

- Ensure we show the ? in all the appropriate places
- Ensure we don't spit ? if we shouldn't
- Ensure we drop ? for the special case of the ToString return