[release/10.0.1xx-preview6] Add CG2 to source-build bundle

[am11]

Porting #49241 on p6.

[am11]

@jkoritzinsky if branch is opened for porting, please merge this so we can test end to end in preview 6 timeframe.

[jkoritzinsky]

cc @mmitche @ViktorHofer I'm OOF right now, can you take a look at this?

[ViktorHofer]

Based on schedule, Preview 6 isn't open anymore. I will let Matt speak to this.

[am11]

If #49480 is going in, there is still some time.

[ViktorHofer]

That PR just got created because code flow subscriptions are (or were, 5 days ago) still enabled. There's no expectation that these backflow PRs will get merged and flow back into the VMR before we ship P6.

Same with these PRs: https://github.com/dotnet/dotnet/pulls?q=is%3Apr+is%3Aopen+preview6. We are not merging them as we already reached code complete.

[mmitche]

@am11 If we take additional p6 fixes (based on validation results) we'll try and get this included.