release: proposals for improving CI signal

[stbenjam]

This is an ex post facto enhancement for TRT's initial proposals
targeting improved CI siginal: job aggregation, quick reverts, etc.
Most of this is already implemented.

This is the existing google doc converted to markdown, in
enhancement-ish format.

[stbenjam]

/assign @deads2k

[deads2k]

This is the doc we had before, so tagging this as our starting point.

/lgtm
/hold

holding so you can get the linter happy.

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[stbenjam]

/hold cancel

@deads2k Needs another lgtm

[deads2k]

/lgtm

[deads2k]

huh, someone changed config in this repo eh?

/approve

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[cgwalters]

Thanks for converting private gdoc to public markdown!

I skimmed through this, looks overall good, just one quick comment:

• The Linux kernel at least has had a lot of success with automated bisection; the "revert PR and see" approach is much more of a crude hammer

xref https://twitter.com/cgwalters/status/1322162509823070208 etc.