### Description

Tracking total hits sometimes has a non-negligible impact on performance. We should disable it when not strictly required.
x-pack/plugin/sql/qa/server/single-node/src/javaRestTest/java/org/elasticsearch/xpack/sql/qa/single_node/CliExplainIT.java
index("test", body -> body.field("test_field", "test_value1").field("i", 1));
        index("test", body -> body.field("test_field", "test_value2").field("i", 2));
        assertThat(command("EXPLAIN (PLAN PARSED) SELECT * FROM test WHERE i = 2"), containsString("plan"));
        assertThat(readLine(), startsWith("----------"));
        assertThat(readLine(), startsWith("With[{}]"));
        assertThat(readLine(), startsWith("\\_Project[[?* AS ?]]"));
        assertThat(readLine(), startsWith("  \\_Filter[?i == 2[INTEGER]]"));
        assertThat(readLine(), startsWith("    \\_UnresolvedRelation[test]"));
        assertEquals("", readLine());
        assertThat(
            command("EXPLAIN " + (randomBoolean() ? "" : "(PLAN ANALYZED) ") + "SELECT * FROM test WHERE i = 2"),
            containsString("plan")
        );
        assertThat(readLine(), startsWith("----------"));
        assertThat(readLine(), startsWith("Project[[test.i{f}#"));
        assertThat(readLine(), startsWith("\\_Filter[test.i{f}#"));
        assertThat(readLine(), startsWith("  \\_EsRelation[test][i{f}#"));
        assertEquals("", readLine());
        assertThat(command("EXPLAIN (PLAN OPTIMIZED) SELECT * FROM test WHERE i = 2"), containsString("plan"));
        assertThat(readLine(), startsWith("----------"));
        assertThat(readLine(), startsWith("Project[[test.i{f}#"));
        assertThat(readLine(), startsWith("\\_Filter[test.i{f}"));
        assertThat(readLine(), startsWith("  \\_EsRelation[test][i{f}#"));
        assertEquals("", readLine());
        assertThat(command("EXPLAIN (PLAN EXECUTABLE) SELECT * FROM test WHERE i = 2"), containsString("plan"));
        assertThat(readLine(), startsWith("----------"));
        assertThat(readLine(), startsWith("EsQueryExec[test,{"));
        assertThat(readLine(), startsWith("  \"query\" : {"));
        assertThat(readLine(), startsWith("    \"term\" : {"));
        assertThat(readLine(), startsWith("      \"i\" : {"));