Fix strange bug seen with '-O2', '--with-valgrind', and valgrind test

I'm guessing this is a bug seen when inlining and one function using assembly
and the other not using assembly related to `zend_string_equal_content`?
At lower optimization levels it passes.
(Environment: gcc 9.3 on Linux)

`make test TESTS='ext/spl/tests/Vector/aggregate.phpt -m --show-mem --show-diff`
fails while compiling the variable in the foreach.

Author: TysonAndre

Zend/zend_string.c

@@ -148,22 +148,7 @@ static zend_always_inline zend_string *zend_interned_string_ht_lookup_ex(zend_ul
 
 static zend_always_inline zend_string *zend_interned_string_ht_lookup(zend_string *str, HashTable *interned_strings)
 {
-	zend_ulong h = ZSTR_H(str);
-	uint32_t nIndex;
-	uint32_t idx;
-	Bucket *p;
-
-	nIndex = h | interned_strings->nTableMask;
-	idx = HT_HASH(interned_strings, nIndex);
-	while (idx != HT_INVALID_IDX) {
-		p = HT_HASH_TO_BUCKET(interned_strings, idx);
-		if ((p->h == h) && zend_string_equal_content(p->key, str)) {
-			return p->key;
-		}
-		idx = Z_NEXT(p->val);
-	}
-
-	return NULL;
+	return zend_interned_string_ht_lookup_ex(ZSTR_H(str), ZSTR_VAL(str), ZSTR_LEN(str), interned_strings);
 }
 
 /* This function might be not thread safe at least because it would update the