Remove AwaitFix HeapAttack tests in 8.11 (#103154)

We've made some improvements in memory tracking in ESQL, but due to 
their complexity, we intentionally chose not to backport them to 8.11.
Without these enhancements, some HeapAttack tests are not ready for
8.11. I think we should remove the AwaitsFix tests and focus on 8.13
instead.

Closes #100640

Author: dnhatn

x-pack/plugin/esql/qa/server/heap-attack/src/javaRestTest/java/org/elasticsearch/xpack/esql/qa/heap_attack/HeapAttackIT.java

@@ -110,21 +110,6 @@ public void testGroupOnSomeLongs() throws IOException {
         assertMap(map, matchesMap().entry("columns", columns).entry("values", values));
     }
 
-    /**
-     * This groups on 5000 columns which used to throw a {@link StackOverflowError}.
-     */
-    public void testGroupOnManyLongs() throws IOException {
-        initManyLongs();
-        Map<?, ?> map = XContentHelper.convertToMap(
-            JsonXContent.jsonXContent,
-            EntityUtils.toString(groupOnManyLongs(5000).getEntity()),
-            false
-        );
-        ListMatcher columns = matchesList().item(matchesMap().entry("name", "MAX(a)").entry("type", "long"));
-        ListMatcher values = matchesList().item(List.of(9));
-        assertMap(map, matchesMap().entry("columns", columns).entry("values", values));
-    }
-
     private Response groupOnManyLongs(int count) throws IOException {
         logger.info("grouping on {} longs", count);
         StringBuilder query = makeManyLongs(count);
@@ -247,12 +232,6 @@ public void testManyEval() throws IOException {
         assertMap(map, matchesMap().entry("columns", columns).entry("values", hasSize(10_000)));
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/100528")
-    public void testTooManyEval() throws IOException {
-        initManyLongs();
-        assertCircuitBreaks(() -> manyEval(1000));
-    }
-
     private Response manyEval(int evalLines) throws IOException {
         StringBuilder query = new StringBuilder();
         query.append("{\"query\":\"FROM manylongs");
@@ -289,12 +268,6 @@ public void testFetchManyBigFields() throws IOException {
         fetchManyBigFields(100);
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/100528")
-    public void testFetchTooManyBigFields() throws IOException {
-        initManyBigFieldsIndex(500);
-        assertCircuitBreaks(() -> fetchManyBigFields(500));
-    }
-
     /**
      * Fetches documents containing 1000 fields which are {@code 1kb} each.
      */
@@ -345,12 +318,6 @@ public void testFetchMvLongs() throws IOException {
         assertMap(map, matchesMap().entry("columns", columns));
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/100528")
-    public void testFetchTooManyMvLongs() throws IOException {
-        initMvLongsIndex(500, 100, 1000);
-        assertCircuitBreaks(() -> fetchMvLongs());
-    }
-
     private Response fetchMvLongs() throws IOException {
         return query("{\"query\": \"FROM mv_longs\"}", "columns");
     }