upgrades: skip known userfile-related corruption in desc validation

[stevendanna]

In previous releases, userfiles would create broken tables because
of incorrect use of the internal executor. As a result, any user that
has used userfile, would fail the 22.2 upgrade precondition check.

This does 2 things:

• 1 allows the precondition to pass even in the presence of an invalid
  object as long as that object is very likely the userfile payload table.

• Adds a new migration that removes the foreign key mutation for userfile
  payload tables.

We determine whether something is a "userfile payload table" by checking
its name, the column names, the column types, the name of the referenced table,
the column names of the referenced table, and the column types of the referenced table.

Release justification: Avoid having a failed upgrade for every user of
userfile.

[cockroach-teamcity]

This change is 

[ajwerner]

This is good, thanks for doing it!

Reviewed 5 of 5 files at r1, 4 of 8 files at r2.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @adityamaru and @ajwerner)

[stevendanna]

bors r=ajwerner

[ajwerner]

Should we add a userfile step to the mixed version roachtests?

[craig]

Build failed (retrying...):

• Bazel Essential CI (Cockroach)

[craig]

Build failed (retrying...):

• Bazel Essential CI (Cockroach)

[yuzefovich]

I think there is a merge skew with #88875, and it looks like the batch with that PR has smaller number and should go in sooner, so this will need to be rebased.

bors r-

[craig]

Canceled.

[stevendanna]

@yuzefovich Thanks

[stevendanna]

bors r+

[craig]

Build failed:

• Bazel Essential CI (Cockroach)

[stevendanna]

bors retry

[craig]

Build succeeded:

• Bazel Essential CI (Cockroach)

[blathers-crl]

Encountered an error creating backports. Some common things that can go wrong:

1. The backport branch might have already existed.
2. There was a merge conflict.
3. The backport branch contained merge commits.

You might need to create your backport manually using the backport tool.

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error creating merge commit from aaaea8b to blathers/backport-release-22.2-88878: POST https://api.github.com/repos/cockroachdb/cockroach/merges: 409 Merge conflict []

you may need to manually resolve merge conflicts with the backport tool.

Backport to branch 22.2.x failed. See errors above.

---

error creating merge commit from aaaea8b to blathers/backport-release-22.2.0-88878: POST https://api.github.com/repos/cockroachdb/cockroach/merges: 409 Merge conflict []

you may need to manually resolve merge conflicts with the backport tool.

Backport to branch 22.2.0 failed. See errors above.

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