pgsql: Refactor grammar to create opt_utility_option_list

Refactor grammar to create opt_utility_option_list

This changes the grammar for REINDEX, CHECKPOINT, CLUSTER, ANALYZE/ANALYSE;
they still accept the same options as before, but the grammar is written
differently for convenience of future development.

Reviewed-by: Nathan Bossart <nathandbossart(at)gmail(dot)com>
Discussion: https://postgr.es/m/202507231538.ir7pjzoow6oe@alvherre.pgsql

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/1dfe3ef3f960d6924eb1f18facf4fbdae6e1cc1d

Modified Files
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src/backend/parser/gram.y | 124 +++++++++++++++++++++-------------------------
1 file changed, 56 insertions(+), 68 deletions(-)