Review POOL_TAGGING uses

(Noticed while looking at CORE-13131.)

POOL_TAGGING grep

reactos/sdk/include/xdk/mmfuncs.h

  38 #define POOL_TAGGING                             1

(added in r46284)

xdk/exfuncs.h uses #ifndef POOL_TAGGING, same as WDK 7.1.

1) Allocate

• New code should use ExAllocatePoolWithTag() and similar.
• Old code should use POOL_TAGGING override(s), as a minimal change/improvement in the meantime.

We should check/improve remaining Allocate calls.

2) Free

When used, some "*AllocatePool*" functions are redefined.
But corresponding "*FreePool*" functions are not.
This seems "half-implemented", for both adding/removing tag parameter.

We should check whether Free calls could use a known tag or (document why) not.
See CORE-13135 as an example/placeholder.