feat: grpc handler result (#2107)

* feat: grpc handler inner result

* feat: ext header, x-greptime-err-code, x-greptime-err-msg

* fix: sqlness case

* chore: by comment

* fix: convert status to Error

tests/cases/distributed/alter/drop_col_not_null_next.result

@@ -1,43 +0,0 @@
-CREATE TABLE test(i BIGINT TIME INDEX, j INTEGER, k INTEGER NOT NULL);
-
-Affected Rows: 0
-
-INSERT INTO test VALUES (1, 1, 11), (2, 2, 12);
-
-Affected Rows: 2
-
-SELECT * FROM test;
-
-+---+---+----+
-| i | j | k  |
-+---+---+----+
-| 1 | 1 | 11 |
-| 2 | 2 | 12 |
-+---+---+----+
-
-ALTER TABLE test DROP COLUMN j;
-
-Affected Rows: 0
-
-INSERT INTO test VALUES (3, NULL);
-
-Error: 1004(InvalidArguments), Failed to insert value to table: greptime.public.test, source: Failed to operate table, source: Column k is not null but input has null
-
-INSERT INTO test VALUES (3, 13);
-
-Affected Rows: 1
-
-SELECT * FROM test;
-
-+---+----+
-| i | k  |
-+---+----+
-| 1 | 11 |
-| 2 | 12 |
-| 3 | 13 |
-+---+----+
-
-DROP TABLE test;
-
-Affected Rows: 1
-

tests/cases/standalone/alter/drop_col_not_null_next.sql

@@ -1,15 +0,0 @@
-CREATE TABLE test(i BIGINT TIME INDEX, j INTEGER, k INTEGER NOT NULL);
-
-INSERT INTO test VALUES (1, 1, 11), (2, 2, 12);
-
-SELECT * FROM test;
-
-ALTER TABLE test DROP COLUMN j;
-
-INSERT INTO test VALUES (3, NULL);
-
-INSERT INTO test VALUES (3, 13);
-
-SELECT * FROM test;
-
-DROP TABLE test;