ES|QL: Add PRESENT ES|QL function

- Fix unit tests

Part of #131069

Author: leontyevdv

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/VerifierTests.java

@@ -2152,7 +2152,7 @@ public void testFilterByAggregate() {
             error("FROM employees | WHERE min(languages) > 2")
         );
         assertEquals(
-            "1:19: aggregate function [present(name)] not allowed outside STATS command",
+            "1:19: aggregate function [present(gender)] not allowed outside STATS command",
             error("FROM test | WHERE present(gender)")
         );
     }

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/expression/function/aggregate/PresentTests.java

@@ -79,7 +79,7 @@ public static Iterable<Object[]> parameters() {
                     List.of(dataType),
                     () -> new TestCaseSupplier.TestCase(
                         List.of(TestCaseSupplier.TypedData.multiRow(List.of(), dataType, "field")),
-                        "Present[field=Attribute[channel=0]]",
+                        "Present",
                         DataType.BOOLEAN,
                         equalTo(false)
                     )
@@ -103,7 +103,7 @@ private static TestCaseSupplier makeSupplier(TestCaseSupplier.TypedDataSupplier
 
             return new TestCaseSupplier.TestCase(
                 List.of(fieldTypedData),
-                "Present[field=Attribute[channel=0]]",
+                "Present",
                 DataType.BOOLEAN,
                 equalTo(present)
             );