Add adaptive_parallelism_strategy to PostgreSQL postmaster settings

Signed-off-by: Shanicky Chen <peng@risingwave-labs.com>

e2e_test/batch/catalog/pg_settings.slt.part

@@ -8,6 +8,7 @@ internal parallel_compact_size_mb
 internal sstable_size_mb
 internal state_store
 internal use_new_object_prefix_strategy
+postmaster adaptive_parallelism_strategy
 postmaster backup_storage_directory
 postmaster backup_storage_url
 postmaster barrier_interval_ms
@@ -80,9 +81,9 @@ SELECT * FROM pg_catalog.pg_settings where name='dummy';
 query TT
 SELECT min(name) name, context FROM pg_catalog.pg_settings GROUP BY context;
 ----
-application_name            user
-backup_storage_directory    postmaster
-block_size_kb               internal
+application_name	user
+adaptive_parallelism_strategy	postmaster
+block_size_kb	internal
 
 # Tab-completion of `SET` command
 query T