executor: split ddl and other executors out from executor.go (#56966)

ref #54436

pkg/executor/BUILD.bazel

@@ -19,6 +19,7 @@ go_library(
         "brie.go",
         "brie_utils.go",
         "builder.go",
+        "check_table_index.go",
         "checksum.go",
         "compact_table.go",
         "compiler.go",
@@ -29,7 +30,6 @@ go_library(
         "delete.go",
         "detach.go",
         "distsql.go",
-        "executor.go",
         "expand.go",
         "explain.go",
         "foreign_key.go",
@@ -49,22 +49,31 @@ go_library(
         "memtable_reader.go",
         "metrics_reader.go",
         "mpp_gather.go",
+        "operate_ddl_jobs.go",
         "opt_rule_blacklist.go",
         "parallel_apply.go",
         "pipelined_window.go",
         "plan_replayer.go",
         "point_get.go",
         "prepared.go",
         "projection.go",
+        "recommend_index.go",
         "reload_expr_pushdown_blacklist.go",
         "replace.go",
         "revoke.go",
         "sample.go",
+        "select.go",
         "select_into.go",
         "set.go",
         "set_config.go",
         "show.go",
+        "show_bdr_role.go",
+        "show_ddl.go",
+        "show_ddl_job_queries.go",
+        "show_ddl_jobs.go",
+        "show_next_row_id.go",
         "show_placement.go",
+        "show_slow_queries.go",
         "show_stats.go",
         "shuffle.go",
         "simple.go",
@@ -319,7 +328,6 @@ go_test(
         "executor_failpoint_test.go",
         "executor_pkg_test.go",
         "executor_required_rows_test.go",
-        "executor_test.go",
         "explain_test.go",
         "explain_unit_test.go",
         "explainfor_test.go",
@@ -347,6 +355,7 @@ go_test(
         "revoke_test.go",
         "sample_test.go",
         "select_into_test.go",
+        "select_test.go",
         "set_test.go",
         "show_placement_labels_test.go",
         "show_placement_test.go",