PR #88061 - clisqlshell: new infrastructure for describe commands

[cockroach-teamcity]

Related PR: cockroachdb/cockroach#88061
Commit: cockroachdb/cockroach@0c81bd1
Epic: https://cockroachlabs.atlassian.net/browse/CRDB-23454
Fixes: cockroachdb/cockroach#95320

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Release note (cli change): The SQL shell (cockroach sql, demo) now
supports the client-side commands \l, \dn, \d, \di, \dm,
\ds, \dt, \dv, \dC, \dT, \dd, \dg, \du and \dd in a
way similar to psql, including the modifier flags S and +, for
convenience for users migrating from PostgreSQL.

A notable difference is that when a pattern argument is specified, it
should use the SQL "LIKE" syntax (with % representing the wildcard
character) instead of PostgreSQL's glob-like syntax (with *
representing wildcards).

Co-authored-by: Nathan VanBenschoten [email protected]