[ITL] Added --datadir, --language and --perflimit for check_postgres

[peteeckel]

This PR contains the check command option definitions for the missing options specified in #8922.

fixes #8922

[Al2Klimov]

LGTM

[Al2Klimov]

Rebase.

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[bobapple]

@cla-bot check

[peteeckel]

Rebase.

Done (after some rounds of pointlessly fighting with the CLA bot).

[Al2Klimov]

pointlessly fighting with the CLA bot

Exactly. As the bot said:

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