Compatibility with PG 14

Merge branch 'master' of git.postgrespro.ru:pgpro-dev/rum

Merge branch 'master' into public_master

Issue postgrespro#61: Invalidate scan->xs_heaptid by hand.

Earlier it was done by invalidating scan->xs_ctup by RelationGetIndexScan().

Issue postgrespro#61: Fix 32-bit result for array test

Merge branch 'fixes_v12_2'

PGPRO-2534: Page get uninitialized because of PostingItem aligning

Issue postgrespro#48: PostgreSQL 10.6 release didn't get rbtree renames

Handle it differently for PostgreSQL 10.6 and 10.7.

Issue postgrespro#48: Renames for PostgreSQL 10 and 11 in rbtree stru…

…ctures and functions

Port RUM to current master