Fix pg_dump TAP tests.

Currecntly TAP tests for pg_dump are red.

```

Test Summary Report
-------------------
t/002_pg_dump.pl            (Wstat: 25088 (exited 98) Tests: 7138 Failed: 98)
  Failed tests:  112, 327, 542, 972, 1402, 1618, 1834, 1976-1977
                1979-1982, 1987-1988, 1993-1995, 2001-2002
                2004, 2010, 2013, 2015, 2023, 2032-2033
                2043, 2045-2050, 2054, 2063, 2073-2074
                2086-2091, 2093-2094, 2101-2104, 2108, 2125
                2135, 2155, 2158-2167, 2169-2171, 2180
                2182, 2185-2189, 2270, 2915, 3345, 3560
                3775, 3990, 4205, 4420, 4635, 4850, 5633-5634
                5644-5645, 5680, 5730, 5812, 5819, 5824
                5845-5846, 6141, 6786, 7001
  Non-zero exit status: 98
t/004_pg_dump_parallel.pl   (Wstat: 1024 (exited 4) Tests: 4 Failed: 4)
  Failed tests:  1-4
  Non-zero exit status: 4
t/010_dump_connstr.pl       (Wstat: 768 (exited 3) Tests: 14 Failed: 3)
  Failed tests:  7-9
  Non-zero exit status: 3
```

Issues cause is appendonly-speicific test and parrallel dump. Fix first
by modifying TAP perl regex. Fix latter by fixing rebase issues with  56b46d3 with changes for pg_backup_archiver.c

Author: reshke

src/bin/pg_dump/pg_backup_archiver.c

@@ -4935,43 +4935,8 @@ CloneArchive(ArchiveHandle *AH)
 
 	/* re-establish fixed state */
 	if (AH->mode == archModeRead)
-	{
-		Assert(AH->connection == NULL);
-
-		/* this also sets clone->connection */
-		ConnectDatabase((Archive *) clone, &clone->public.ropt->cparams, true, false);
-
-		/* re-establish fixed state */
 		_doSetFixedOutputState(clone);
-	}
-	else
-	{
-		PQExpBufferData connstr;
-		char	   *pghost;
-		char	   *pgport;
-		char	   *username;
-
-		Assert(AH->connection != NULL);
-
-		/*
-		 * Even though we are technically accessing the parent's database
-		 * object here, these functions are fine to be called like that
-		 * because all just return a pointer and do not actually send/receive
-		 * any data to/from the database.
-		 */
-		initPQExpBuffer(&connstr);
-		appendPQExpBufferStr(&connstr, "dbname=");
-		appendConnStrVal(&connstr, PQdb(AH->connection));
-		pghost = PQhost(AH->connection);
-		pgport = PQport(AH->connection);
-		username = PQuser(AH->connection);
-
-		/* this also sets clone->connection */
-		ConnectDatabase((Archive *) clone, &clone->public.ropt->cparams, true, false);
-
-		termPQExpBuffer(&connstr);
-		/* setupDumpWorker will fix up connection state */
-	}
+	/* in write case, setupDumpWorker will fix up connection state */
 
 	/* Let the format-specific code have a chance too */
 	clone->ClonePtr(clone);

src/bin/pg_dump/t/002_pg_dump.pl

@@ -2214,20 +2214,22 @@
 		create_order => 19,
 		create_sql	=> 'CREATE TABLE dump_test.test_table_ao(a integer, b text)
 						WITH (appendonly = true, compresstype = zlib, compresslevel = 1);',
-		regexp => qr/^
-			\QCREATE TABLE dump_test.test_table_ao (\E\n
-			\s+\Qa integer,\E\n
-			\s+\Qb text\E\n
-			\QWITH (appendonly = true, orientation = column, compresstype = zlib, compresslevel = 1);\E\n/xm,
+		regexp => qr{^
+			\QCREATE TABLE dump_test.test_table_ao (\E
+			\n\s+\Qa integer,\E
+			\n\s+\Qb text\E
+			\n\Q)\E
+			\n\QWITH (appendonly = true, compresstype=zlib, compresslevel='1');\E
+			}xm,
 		like => {
 			%full_runs,
 			%dump_test_schema_runs,
-			only_dump_test_table => 1,
 			section_pre_data     => 1,
+			exclude_test_table       => 1,
 		},
 		unlike => {
+			only_dump_test_table => 1,
 			exclude_dump_test_schema => 1,
-			exclude_test_table       => 1,
 		},
 	},