Upgrade dependencies to versions available on azure feeds

Convert MakeMethodSynchronousTests to the new test library

Add code fix for CS0513

Microsoft.Net.Compilers.Toolset
 From Version 3.7.0-4.20324.3 -> To Version 3.8.0-1.20353.1
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

FIx Redundant Cast incorrect for SimpleArguments #44516

Operation with native integer constant that might overflow in unchecked context should be treated as not constant (#45581)

Revert link to previous URL

Align addition of a synthesized override of Base.Equals(Base? other) in records with the latest design. (#45601)

Related to #45296.

From specification:
If the record type is derived from a base record type Base, the record type includes a synthesized override of the strongly-typed Equals(Base other). The synthesized override is sealed. It is an error if the override is declared explicitly. The synthesized override returns Equals((object?)other).

This change also adjusts code-gen to properly compare EqualityContracts.

Fix AD0001 for IDE0076

Handle invalid dotnet_diagnostic entry without ID part in configurati…

Fix issue preventing going to def on a complicated metadata symbol involving nullability and generics

Fixes #45465
Ensure we normalize the target scope passed to target symbol resolver. It doesn't handle the recently added 'namespaceanddescendants' scope in legacy target string format and expects it to be normalized to 'namespace' scope.

Fixes #45446

* Update AttributeTests.cs

* Update NullableReferenceTypesTests.cs

* Update NullableReferenceTypesTests.cs

* Fixed NullPointerException

* Removed duplicate test

* PR changes

* Added Robustness and Nullable Checks

* PR Changes

* Moved test to avoid merge conflict

Fix tests broken by two PRs "crossing".

Microsoft.Net.Compilers.Toolset
 From Version 3.7.0-4.20319.6 -> To Version 3.7.0-4.20324.3
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Align addition of a synthesized override of object.GetHashCode() in records with the latest design. (#45518)

Related to #45296.

From specification:
The record type includes a synthesized override of object.GetHashCode(). The method can be declared explicitly. It is an error if the explicit declaration is sealed unless the record type is sealed.

Fix issue preventing going to def on a complicated metadata symbol involving nullability and generics

Fixes #44139.

Show format string completion options when the formatting component colon is typed

Merge release/dev16.7 to master

Add IDE analyzer for unnecessary pragma suppressions

Soft select the item with longest common prefix