backport-23.1: jobs: only store 23.1 debugging info after 23.1 upgrade

[dt]

Just the last commit of #113864 more or less.

Release note: none.
Epic: none.

[blathers-crl]

It looks like your PR touches production code but doesn't add or edit any test code. Did you consider adding tests to your PR?

_{🦉 Hoot! I am a Blathers, a bot for CockroachDB. My owner is dev-inf.}

[cockroach-teamcity]

This change is 

[dt]

Are all of the changes protected via a flag or option, new syntax, an environment variable or default-disabled cluster setting?

No, it's a bug fix.

What are the risks to backporting this change?

minimal - it wraps code that was always on in version gates so it is now always on only after upgrade.

Can the risks of backporting be mitigated?

No.

What are the risks to not backporting?

#113795

Does this change really need to be backported? Or can it reasonably wait until the next major release to be addressed?

partially fixes a regression in 23.1.11 that if unfixed is very bad for upgrades.

[dt]

blathers backport 23.1.12-rc.FROZEN