server: add NodeIds to DatabaseDetails and TableStats responses

[xinhaoz]

Related to: #63391

Previously, DatabaseDetails and TableStats did not return a list
of nodes that store their data. This commit adds an ordered
list of node ids to each of the responses. This is necessary
to report node/region information in the DB console databases
pages. For the database details endpoint, we return the list
of nodes only if stats are requested.

Release justification: low risk, high benefit changes to existing
functionality

Release note (api change): A list of node ids representing the
nodes that store data for the database has been added to the
stats field in the databases details endpoint under nodeIds.
Database details must be requested with include_stats set to true,
e.g. /_admin/v1/databases/{database}?include_stats=true

Similarly, nodeIds has also been added to the table stats
endpoint, which is an ordered list of node ids which stores
the table data:
/_admin/v1/databases/{database}/tables/{table}/stats

[cockroach-teamcity]

This change is 

[Azhng]

More of a general comment. The concept of NodeID is going away in the Serverless. The tenant nodes will only be able to have SQLInstanceID assigned to the SQL Pod, since all the actual nodes (the KV Pods in this case) are shared among all the tenants.

We already have a handful of RPC endpoints that need to deal with this awkwardness. Should even further pollute the NodeID concept into more RPC endpoints?

[maryliag]

This information will not be displayed on serverless, precisely because nodes don't make sense on it. But we need this for dedicated and specially multi-region, and on those cases the value is indeed node. So for the purpose of this issue, use NodeID.

[maryliag]

Reviewed 4 of 5 files at r1, all commit messages.
Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @xinhaoz)

---

pkg/server/admin.go, line 560 at r1 (raw file):

	}

	// Track all nodes storing database

nit: databases
nit: period

[maryliag]

Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @xinhaoz)

[xinhaoz]

bors r+

[craig]

Build succeeded:

• GitHub CI (Cockroach)