Update .NET 6 to version 6.0.100-rc.2.21505.57

[adityapatwardhan]

PR Summary

Update .NET to the latest version of .NET 6

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[daxian-dbw]

@adityapatwardhan Let me know if you think this PR is ready to merge.

[iSazonov]

@daxian-dbw Have you taken measurements of the startup scenario yet? Are you planning to? Or are we leaving it as it is?

[adityapatwardhan]

@iSazonov I took the measurements for startup with new .NET performance features. No significant benefit and increase in package size. We will investigate further for 7.3.

[adityapatwardhan]

@daxian-dbw I want Travis to review before we merge.

[iSazonov]

@iSazonov I took the measurements for startup with new .NET performance features. No significant benefit and increase in package size. We will investigate further for 7.3.

My ask is about PerfView - we could find places for minor perf wins.

[TravisEz13]

fix the one issue and approved

[ghost]

🎉v7.2.0-rc.1 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes

[ghost]

🎉v7.3.0-preview.1 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes