kasan: cleanup of kasan_enabled() checks

kasan: cleanup of kasan_enabled() checks

Deduplication of kasan_enabled() checks which are already used by callers.

* Altered functions:

check_page_allocation
	Delete the check because callers have it already in __wrappers in
	include/linux/kasan.h:
		__kasan_kfree_large
		__kasan_mempool_poison_pages
		__kasan_mempool_poison_object

kasan_populate_vmalloc, kasan_release_vmalloc
	Add __wrappers in include/linux/kasan.h.
	They are called externally in mm/vmalloc.c.

__kasan_unpoison_vmalloc, __kasan_poison_vmalloc
	Delete checks because there're already kasan_enabled() checks
	in respective __wrappers in include/linux/kasan.h.

release_free_meta -- Delete the check because the higher caller path
	has it already. See the stack trace:

	__kasan_slab_free -- has the check already
	__kasan_mempool_poison_object -- has the check already
		poison_slab_object
			kasan_save_free_info
				release_free_meta
					kasan_enabled() -- Delete here

Link: https://lkml.kernel.org/r/20251009155403.1379150-3-snovitoll@gmail.com
Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>