Pass HASH_BLOBS to hash_create() instead of expicit tag_hash

As per hash_create docs:

> Note: It is deprecated for callers of hash_create() to explicitly specify
> string_hash, tag_hash, uint32_hash, or oid_hash.  Just set HASH_STRINGS or
> HASH_BLOBS.  Use HASH_FUNCTION only when you want something other than
> one of these.

Also there is no need to explicitly specify TopMemoryContext as it is
used by default.

Author: Sergey Shinderuk

collector.c

@@ -11,7 +11,6 @@
 
 #include <signal.h>
 
-#include "common/hashfn.h"
 #include "compat.h"
 #include "miscadmin.h"
 #include "pg_wait_sampling.h"
@@ -288,17 +287,14 @@ make_profile_hash()
 {
 	HASHCTL		hash_ctl;
 
-	hash_ctl.hash = tag_hash;
-	hash_ctl.hcxt = TopMemoryContext;
-
 	if (pgws_profileQueries)
 		hash_ctl.keysize = offsetof(ProfileItem, count);
 	else
 		hash_ctl.keysize = offsetof(ProfileItem, queryId);
 
 	hash_ctl.entrysize = sizeof(ProfileItem);
 	return hash_create("Waits profile hash", 1024, &hash_ctl,
-					   HASH_FUNCTION | HASH_ELEM);
+					   HASH_ELEM | HASH_BLOBS);
 }
 
 /*