ui: show recent executions even without lock information

[maryliag]

Previously, if the call to retrieve contention/lock information returned a max size limit error, we were not displaying any data on the recent executions.
Now we show the data returned with a warning that cluster locks information might be missing.

Part Of #96184

Release note (ui change): Still show active execution information when there is a max size limit error.

[cockroach-teamcity]

This change is 

[maryliag]

bors r+

[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 efdf5aa to blathers/backport-release-22.2-97662: 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.

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