refactor(schema-api): extract TableApi and IndexApi traits (#18652)

Extract table and index operations from SchemaApi into separate
traits to improve modularity and separation of concerns. This
change organizes the codebase into focused, specialized traits
for better maintainability and clearer API boundaries.

Key changes:
- Create TableApi trait in src/meta/api/src/table_api.rs with all
  table lifecycle operations (create, drop, rename, truncate, etc.)
- Create IndexApi trait in src/meta/api/src/index_api.rs with all
  index management operations (create, drop, list, gc operations)
- Move corresponding implementations from schema_api.rs to the new
  trait files while preserving all existing functionality
- Update imports across the codebase to use the new traits
- Add required type parameters for generic method calls where the
  Rust compiler cannot infer types automatically
- Make internal utility functions public where needed by the new
  trait implementations

This refactoring maintains full API compatibility while creating
a cleaner, more organized code structure that will facilitate
future development and testing.

Author: drmingdrmer

src/meta/api/src/index_api.rs

@@ -22,6 +22,7 @@ mod data_mask_api;
 mod data_mask_api_impl;
 mod database_api;
 pub mod database_util;
+pub mod index_api;
 pub mod kv_app_error;
 pub mod kv_pb_api;
 pub mod kv_pb_crud_api;
@@ -32,6 +33,7 @@ pub mod reply;
 mod schema_api;
 mod schema_api_test_suite;
 mod sequence_api;
+pub mod table_api;
 pub(crate) mod testing;
 pub mod txn_backoff;
 pub mod util;
@@ -45,10 +47,12 @@ pub(crate) mod sequence_nextval_impl;
 
 pub use data_mask_api::DatamaskApi;
 pub use database_api::DatabaseApi;
+pub use index_api::IndexApi;
 pub use row_access_policy_api::RowAccessPolicyApi;
 pub use schema_api::SchemaApi;
 pub use schema_api_test_suite::SchemaApiTestSuite;
 pub use sequence_api::SequenceApi;
+pub use table_api::TableApi;
 pub use util::assert_table_exist;
 pub use util::db_has_to_exist;
 pub use util::deserialize_struct;

src/meta/api/src/lib.rs

@@ -156,9 +156,11 @@ use crate::testing::get_kv_data;
 use crate::testing::get_kv_u64_data;
 use crate::util::IdempotentKVTxnSender;
 use crate::DatamaskApi;
+use crate::IndexApi;
 use crate::RowAccessPolicyApi;
 use crate::SchemaApi;
 use crate::SequenceApi;
+use crate::TableApi;
 use crate::DEFAULT_MGET_SIZE;
 
 /// Test suite of `SchemaApi`.