…129.2 (#3149)

[main] Update dependencies from dotnet/arcade

Fixes an analysis hole where reflecting on instance methods of RUC
types produced no warnings. This isn't trim-compatible in case the
methods are decorated with attributes with RUC constructors, or in
case they are invoked on a null instance. We don't warn for RUC
attributes on methods in RUC types, but instead prevent reflection
access from creating these attributes by warning on the reflection
access to methods (including instance methods).

This leaves the attribute warnings for fields as-is - so instance
fields will get attribute warnings unlike instance methods, because we
don't warn on reflection access to instance fields in RUC types. This
is currently inconsistent with the analyzer behavior, which doesn't warn
for attributes in this case.

The ILLink analyzer testcase generator was generating extra
testcases in dotnet/runtime, compared to linker. It turned out
that in dotnet/linker, testcases with non-public Main methods
were not getting generated, because the generator was getting a
reference assembly for Mono.Linker.Tests.Cases.dll (which doesn't
contain the non-public entry point), whereas dotnet/runtime has
ref assembly generation turned off (so the analyzer was correctly
discovering testcases based on the implementation assembly).

This fixes the issue by turning off ref assembly generation for
all projects except those specifically designed to be ref
assemblies.

The CompilerGeneratedCodeSubstitutions is disabled because it is
not supported by the analyzer.