chore: expose some codes to let other projects use them (#3115)

src/cmd/src/standalone.rs

@@ -464,7 +464,7 @@ impl StartCommand {
         Ok(ddl_task_executor)
     }
 
-    async fn create_table_metadata_manager(
+    pub async fn create_table_metadata_manager(
         kv_backend: KvBackendRef,
     ) -> Result<TableMetadataManagerRef> {
         let table_metadata_manager = Arc::new(TableMetadataManager::new(kv_backend));

src/common/meta/src/ddl/table_meta.rs

@@ -33,6 +33,7 @@ use crate::rpc::router::{Region, RegionRoute};
 use crate::sequence::SequenceRef;
 use crate::wal::{allocate_region_wal_options, WalOptionsAllocatorRef};
 
+#[derive(Clone)]
 pub struct TableMetadataAllocator {
     table_id_sequence: SequenceRef,
     wal_options_allocator: WalOptionsAllocatorRef,