MDEV-33161 Function pointer signature mismatch in LF_HASH

In cmake -DWITH_UBSAN=ON builds with clang but not with GCC,
-fsanitize=undefined will flag several runtime errors on
function pointer mismatch related to the lock-free hash table LF_HASH.

Let us use matching function signatures and remove function pointer
casts in order to avoid potential bugs due to undefined behaviour.

These errors could be caught at compilation time by
-Wcast-function-type-strict, which is available starting with clang-16,
but not available in any version of GCC as of now. The old GCC flag
-Wcast-function-type is enabled as part of -Wextra, but it specifically
does not catch these errors.

Reviewed by: Vladislav Vaintroub

mysys/waiting_threads.c

@@ -424,8 +424,10 @@ static void wt_resource_destroy(uchar *arg)
   It's called from lf_hash when an element is inserted.
 */
 static void wt_resource_init(LF_HASH *hash __attribute__((unused)),
-                             WT_RESOURCE *rc, WT_RESOURCE_ID *id)
+                             void *resource, const void *ident)
 {
+  WT_RESOURCE *rc= resource;
+  const WT_RESOURCE_ID *id= ident;
   DBUG_ENTER("wt_resource_init");
   rc->id= *id;
   rc->waiter_count= 0;