ui, sql: Record KV CPU Time in statement and transaction statistics

[alyshanjahani-crl]

This commit starts recording the newly added kvCPUTime field from topLevelQueryStats and exposes it in the UI.

Fixes: https://cockroachlabs.atlassian.net/browse/CRDB-57265 Release note (ui change): KV CPU Time is now recorded to statement_statistics and transaction_statistics and is displayed in the SQL Activity page.

[cockroach-teamcity]

This change is 

[alyshanjahani-crl]

Column on Statements table, Column on Transactions table, tool tip, listing kvCPUTime on panel in stmt fingerprint overview

[kyle-a-wong]

Looks good, juste have a small request about the new field name

@kyle-a-wong reviewed 16 of 19 files at r1, 1 of 1 files at r2.
Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @jasonlmfong)

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pkg/sql/appstatspb/app_stats.proto line 148 at r1 (raw file):

  // representative of the "synchronous" portion of work performed by KV
  // (ex/ not replication related work).
  optional NumericStat kv_cpu_time = 38 [(gogoproto.nullable) = false, (gogoproto.customname) = "KVCPUTime"];

Can we name this kv_cpu_time_nanos to match the naming convention of cpu_time_nanos in ExecStats?

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pkg/sql/appstatspb/app_stats.proto line 200 at r1 (raw file):

  // representative of the "synchronous" portion of work performed by KV
  // (ex/ not replication related work).
  optional NumericStat kv_cpu_time = 12 [(gogoproto.nullable) = false, (gogoproto.customname) = "KVCPUTime"];

Same here

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pkg/sql/sqlstats/ssprovider.go line 88 at r1 (raw file):

	RowsRead                 int64
	RowsWritten              int64
	KVCPUTime                int64

Same comment here, can we name it `KVCPUTimeNanos

[jasonlmfong]

nit: on top of what Kyle said, would it also make sense to replace cpu in go/ts to SQLcpu to contrast the KVcpu even more?
otherwise

Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @alyshanjahani-crl and @kyle-a-wong)

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pkg/sql/appstatspb/app_stats.proto line 148 at r1 (raw file):

Previously, kyle-a-wong (Kyle Wong) wrote…

Can we name this kv_cpu_time_nanos to match the naming convention of cpu_time_nanos in ExecStats?

agree with this one

[alyshanjahani-crl]

Renamed to KVCPUTimeNanos

For future reference though, can we not use "requested changes" for nit's / trivial changes / renames.
I can do a rename and then merge, but w/ "requested changes" it blocks merging.