sql: add estimated and actual statistics to telemetry logging

[rytaft]

This commit adds several new fields to the SampledQuery structure used for
telemetry logging.

Closes #71666

Release note (sql change): The structured payloads used for telemetry
logs now include the following new fields:
MaxFullScanRowsEstimate: Maximum number of rows scanned by a full scan,
as estimated by the optimizer.
TotalScanRowsEstimate: Total number of rows read by all scans in the query,
as estimated by the optimizer.
OutputRowsEstimate: The number of rows output by the query, as estimated
by the optimizer.
StatsAvailable: Whether table statistics were available to the optimizer
when planning the query.
NanosSinceStatsCollected: The maximum number of nanoseconds that have
passed since stats were collected on any table scanned by this query.
BytesRead: The number of bytes read from disk.
RowsRead: The number of rows read from disk.
RowsWritten: The number of rows written.

[cockroach-teamcity]

This change is 

[yuzefovich]

Reviewed 11 of 11 files at r1, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @kevin-v-ngo, @michae2, and @vy-ton)

[kevin-v-ngo]

This is great! Excited to see the insights we're going to pull from this.

[kevin-v-ngo]

This is the maximum full scan over both full index and full table scans correct?

[rytaft]

TFTRs!

Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @kevin-v-ngo, @michae2, and @vy-ton)

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docs/generated/eventlog.md line 2468 at r1 (raw file):

Previously, kevin-v-ngo wrote…

This is the maximum full scan over both full index and full table scans correct?

Yep, that's correct

[rytaft]

bors r+

[craig]

Build failed (retrying...):

• GitHub CI (Cockroach)

[craig]

Build succeeded:

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

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error creating merge commit from e1f2459 to blathers/backport-release-22.1-85169: 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 22.1.x failed. See errors above.

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