Merge #123707 #124165

123707: roachtest: adjust pg_regress and the diff r=yuzefovich a=yuzefovich

This commit comments out two queries that should return zero rows but return plenty in CRDB (due to incomplete / incorrect population of pg_catalog vtables). These are tracked by two new issues.

It also updates the diff with the changes to fix up polymorphic types (not yet merged, #123459).

Additionally, it picks up an unexpected diff around two time zone queries. I briefly looked into this, and I can't reproduce the problem manually (it might be something in how we run the pg_regress suite that I'm missing). In any case, it doesn't seem like a big deal to just take this in since this diff has been showing up for the last couple of months all the time. No issue filed since I couldn't repro though.

Fixes: #123401.

Release note: None

124165: pkg/sql: revert "deflake TestTenantGlobalAggregatedLivebytes" r=jaylim-crl a=jaylim-crl

This reverts commit 8f0503f.
The test seems to have failed again in #120775 (comment).

Epic: none

Release note: None

Co-authored-by: Yahor Yuzefovich <yahor@cockroachlabs.com>
Co-authored-by: Jay <jay@cockroachlabs.com>