Is your feature request related to a problem? Please describe.
Currently there're a few option clauses of CREATE FUNCTION statement unimplemented, and we throw unimplemented error at the parser level. It's sufficient to block users from using them, but we also need to make sure we have telemetry support for this unsupported features so that we can tell which features are most wanted and prioritize our work.

The options of CREATE FUNCTION statement in question are:
EXTERNAL SECURITY DEFINER
EXTERNAL SECURITY INVOKER
SECURITY DEFINER
SECURITY INVOKER
COST numeric_only
ROWS numeric_only
SUPPORT name
SET
RESET
PARALLEL
TRANSFORM
WINDOW

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Jira issue: CRDB-17373
Epic: CRDB-3405