release-22.1: stats: fix missing autostats on cluster startup

[blathers-crl]

Backport 1/1 commits from #88673 on behalf of @msirek.

/cc @cockroachdb/release

---

Fixes #87247

Previously, automatic statistics may fail to be collected on tables
with no stats at cluster startup when the
sql.stats.automatic_collection.enabled cluster setting is false
but table storage parameter sql_stats_automatic_collection_enabled
is true.

Method ensureAllTables does not put entries into the settingOverrides
map, and since storage parameter info is not normally looked up in the
table header in auto stats processing, we fall back on the cluster
setting to determine if auto stats should be collected.

To address this, this patch modifies auto stats to flag whether the
current batch of tables saved in the mutationCounts map comes from
cluster startup processing, and if so, ensures that storage
parameters controlling auto stats are always looked up in the table
header during that processing.

Release note (bug fix): This patch fixes missing automatic statistics
collection at cluster startup when the
sql.stats.automatic_collection.enabled cluster setting is false,
but there are tables with storage parameter
sql_stats_automatic_collection_enabled set to true.

---

Release justification: Low risk fix for missing autostats functionality

[blathers-crl]

Thanks for opening a backport.

Please check the backport criteria before merging:

• Patches should only be created for serious issues or test-only changes.
• Patches should not break backwards-compatibility.
• Patches should change as little code as possible.
• Patches should not change on-disk formats or node communication protocols.
• Patches should not add new functionality.
• Patches must not add, edit, or otherwise modify cluster versions; or add version gates.

If some of the basic criteria cannot be satisfied, ensure that the exceptional criteria are satisfied within.

• There is a high priority need for the functionality that cannot wait until the next release and is difficult to address in another way.
• The new functionality is additive-only and only runs for clusters which have specifically “opted in” to it (e.g. by a cluster setting).
• New code is protected by a conditional check that is trivial to verify and ensures that it only runs for opt-in clusters.
• The PM and TL on the team that owns the changed code have signed off that the change obeys the above rules.

Add a brief release justification to the body of your PR to justify this backport.

Some other things to consider:

• What did we do to ensure that a user that doesn’t know & care about this backport, has no idea that it happened?
• Will this work in a cluster of mixed patch versions? Did we test that?
• If a user upgrades a patch version, uses this feature, and then downgrades, what happens?

[cockroach-teamcity]

This change is 

[rytaft]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @michae2 and @msirek)