server: Create new api for table metadata

[kyle-a-wong]

adds a new api v2 endpoint, /api/v2/table_metadata/.

This new API enables the ability to retrieve paginated table metadata for a given database.

Resolves: https://github.com/cockroachdb/cockroach/issues/128894 Epic: CRDB-37558 Release note: None

[blathers-crl[bot]]

Your pull request contains more than 1000 changes. It is strongly encouraged to split big PRs into smaller chunks.

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[cockroach-teamcity]

This change is 

[kyle-a-wong]

TFTR!

bors r+

[craig[bot]]

Build succeeded:

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