It was getting in the way of backporting commit 9b1b9446f5 from PostgreSQL,
which added an '#include "storage/lock.h"' to resowner.h, forming a cycle.

The include was only needed for the decalaration of awaitedOwner global
variable. Replace "ResourceOwner" with the equivalent "struct
ResourceOwnerData *" to avoid it.

This revealed a bunch of other files that were relying on resowner.h
being indirectly included through lock.h. Include resowner.h directly
in those files.

The ResPortalIncrement.owner field was not used for anything, so instead
of including resowner.h in that file, just remove the field that needed
it.

Bad things happen otherwise. One case in point is create database
followed by a crash. Create database requests a checkpoint after
inserting new tuple into pg_database. Crash happens right after
create database commits and before clog update is not flushed to disk.
Relcache initialization before xlog replay will set HEAP_XMIN_INVALID
hint bit in the newly created database's tuple because clog did not
report the xmin as committed.

The FileRep processes including:
- recovery process
- resync manager process
- resync worker process

Currently we see FTS failure in the CI pipeline due to the filerep resync
manager and workers are still in the recovery mode while relcache got
initialized.

This reverts commit f8f6587e and
0e9d10d2.

Bad things happen otherwise.  One case in point is create database
followed by a crash.  Create database requests a checkpoint after
inserting new tuple into pg_database.  Crash happens right after
create database commits and before clog update is not flushed to disk.
Relcache initialization before xlog replay will set HEAP_XMIN_INVALID
hint bit in the newly created database's tuple because clog did not
report the xmin as committed.

gpverify functionality was planned in past to deliver online
verification of primary and mirror. It's completely dead code as never
exposed this functionality and have no plans either. It eliminates
creation of unused processes, extra directory, some shared memory and
all.