Pass down table relation into more index relation functions

Andres Freund <andres@anarazel.de>

Commit: 61b313e47eb987682441c675724c22bf4363c9c4
Author: Andres Freund <andres@anarazel.de>
Date: 2023-04-02T03:18:29Z
Releases: 16.0
Pass down table relation into more index relation functions

This is done in preparation for logical decoding on standby, which needs to
include whether visibility affecting WAL records are about a (user) catalog
table. Which is only known for the table, not the indexes.

It's also nice to be able to pass the heap relation to GlobalVisTestFor() in
vacuumRedirectAndPlaceholder().

Author: "Drouvot, Bertrand" <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/21b700c3-eecf-2e05-a699-f8c78dd31ec7@gmail.com

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