API diff between .NET 9 RC1 and .NET 9 RC 2

[ericstj]

Repo area owners:

• WinForms - @merriemcgaw @lonitra @JeremyKuhne
• Libraries - @artl93 @jeffschwMSFT @jeffhandley @karelz @ericstj @stephentoub @SamMonoRT

Libraries area owners:

• System.Drawing @dotnet/area-system-drawing @lonitra @merriemcgaw @JeremyKuhne
• System.Reflection.Emit @dotnet/area-system-reflection-emit @buyaa-n
• System.Runtime.Intrinsics @dotnet/area-system-runtime-intrinsics @tannergooding
• System.Text.Json @dotnet/area-system-text-json @eiriktsarpalis

Known api-diff tool issues:

If yo usee any of these, please provide a GitHub suggestion in this PR to correct it:

• The AsmDiff tool sometimes skips adding { or {} arcade#10981([AsmDiff] For attributes, move the +/- diff symbol to the attribute instead of the affected API arcade#13814)
• RequiresPreviewAttribute not getting auto added arcade#14498
• Changes to protected internal visibility should stop showing. AsmDiff: Do not show APIs with protected internal visibility arcade#14579
• The AsmDiff tool shows APIs with decorating attribute changes as removed and re-added, instead of showing only the API. Please ignore this, it might be confusing but technically it's not incorrect: [arcade#13814]

[buyaa-n]

Reflection.Emit change looks good

[eiriktsarpalis]

STJ changes LGTM

[ericstj]

@JeremyKuhne can I get your check of the WindowsDesktop changes?

[ericstj]

@carlossanlop does this look good to you, anything we need to do manually to this?