Fixes for failing FieldNameUtilsTests due to snapshot operators being tested (#132727)

* Addresses #132711

Author: svilen-mihaylov-elastic

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/session/FieldNameUtilsTests.java

@@ -2243,6 +2243,8 @@ public void testForkRef4() {
     }
 
     public void testRerankerAfterFuse() {
+        assumeTrue("FUSE required", EsqlCapabilities.Cap.FUSE.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM books METADATA _id, _index, _score
             | FORK ( WHERE title:"Tolkien" | SORT _score, _id DESC | LIMIT 3 )
@@ -2256,6 +2258,8 @@ public void testRerankerAfterFuse() {
     }
 
     public void testSimpleFuse() {
+        assumeTrue("FUSE required", EsqlCapabilities.Cap.FUSE.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM employees METADATA _id, _index, _score
             | FORK ( WHERE emp_no:10001 )
@@ -2267,6 +2271,8 @@ public void testSimpleFuse() {
     }
 
     public void testFuseWithMatchAndScore() {
+        assumeTrue("FUSE required", EsqlCapabilities.Cap.FUSE.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM books METADATA _id, _index, _score
             | FORK ( WHERE title:"Tolkien" | SORT _score, _id DESC | LIMIT 3 )
@@ -2279,6 +2285,8 @@ public void testFuseWithMatchAndScore() {
     }
 
     public void testFuseWithDisjunctionAndPostFilter() {
+        assumeTrue("FUSE required", EsqlCapabilities.Cap.FUSE.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM books METADATA _id, _index, _score
             | FORK ( WHERE title:"Tolkien" OR author:"Tolkien" | SORT _score, _id DESC | LIMIT 3 )
@@ -2292,6 +2300,8 @@ public void testFuseWithDisjunctionAndPostFilter() {
     }
 
     public void testFuseWithStats() {
+        assumeTrue("FUSE required", EsqlCapabilities.Cap.FUSE.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM books METADATA _id, _index, _score
             | FORK ( WHERE title:"Tolkien" | SORT _score, _id DESC | LIMIT 3 )
@@ -2303,6 +2313,8 @@ public void testFuseWithStats() {
     }
 
     public void testFuseWithMultipleForkBranches() {
+        assumeTrue("FUSE required", EsqlCapabilities.Cap.FUSE.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM books METADATA _id, _index, _score
             | FORK (WHERE author:"Keith Faulkner" AND qstr("author:Rory or author:Beverlie") | SORT _score, _id DESC | LIMIT 3)
@@ -2318,6 +2330,8 @@ public void testFuseWithMultipleForkBranches() {
     }
 
     public void testFuseWithSemanticSearch() {
+        assumeTrue("FUSE required", EsqlCapabilities.Cap.FUSE.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM semantic_text METADATA _id, _score, _index
             | FORK ( WHERE semantic_text_field:"something" | SORT _score DESC | LIMIT 2)
@@ -2503,6 +2517,8 @@ public void testForkWithUnsupportedAttributes() {
     }
 
     public void testForkAfterLookupJoin() {
+        assumeTrue("LOOKUP JOIN available as snapshot only", EsqlCapabilities.Cap.JOIN_LOOKUP_V12.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames(
             """
                 FROM employees
@@ -2529,6 +2545,8 @@ public void testForkAfterLookupJoin() {
     }
 
     public void testForkBeforeLookupJoin() {
+        assumeTrue("LOOKUP JOIN available as snapshot only", EsqlCapabilities.Cap.JOIN_LOOKUP_V12.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames(
             """
                 FROM employees
@@ -2555,6 +2573,8 @@ public void testForkBeforeLookupJoin() {
     }
 
     public void testForkBranchWithLookupJoin() {
+        assumeTrue("LOOKUP JOIN available as snapshot only", EsqlCapabilities.Cap.JOIN_LOOKUP_V12.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames(
             """
                 FROM employees
@@ -2826,6 +2846,8 @@ public void testForkAfterMvExpand() {
     }
 
     public void testForkBeforeInlineStatsIgnore() {
+        assumeTrue("INLINESTATS required", EsqlCapabilities.Cap.INLINESTATS_V9.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM employees
             | KEEP emp_no, languages, gender
@@ -2837,6 +2859,8 @@ public void testForkBeforeInlineStatsIgnore() {
     }
 
     public void testForkBranchWithInlineStatsIgnore() {
+        assumeTrue("INLINESTATS required", EsqlCapabilities.Cap.INLINESTATS_V9.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM employees
             | KEEP emp_no, languages, gender
@@ -2849,6 +2873,8 @@ public void testForkBranchWithInlineStatsIgnore() {
     }
 
     public void testForkAfterInlineStatsIgnore() {
+        assumeTrue("INLINESTATS required", EsqlCapabilities.Cap.INLINESTATS_V9.isEnabled());
+        assertTrue("FORK required", EsqlCapabilities.Cap.FORK_V9.isEnabled());
         assertFieldNames("""
             FROM employees
             | KEEP emp_no, languages, gender