### What problem does this PR solve?

cloud heavy sc job will retry the whole alter tasks when encounter
`KV_TXN_CONFLICT_RETRY_EXCEEDED_MAX_TIMES` error in
`commit_tablet_job`(#46748). We
should remove stop token(#48399) in
MS for the sc job if it fails in `commit_tablet_job`, otherwise the
later retries may fail to regsiter stop token(because the first stop
token won't expire in `config::lease_compaction_interval_seconds *
4=80s`) and the schema change job will fail.

```
I20250318 15:40:15.851157  7677 task_worker_pool.cpp:423] successfully submit task|type=ALTER|signature=1742283174829
I20250318 15:40:31.346628  6496 task_worker_pool.cpp:1999] get alter table task, signature: 1742283174829
I20250318 15:40:31.346635  6496 task_worker_pool.cpp:281] start alter tablet|signature=1742283174829|base_tablet_id=1742283170711|new_tablet_id=1742283174829|mem_limit=10682972209
I20250318 15:40:31.350860  6496 cloud_schema_change_job.cpp:132] Begin to alter tablet. base_tablet_id=1742283170711, new_tablet_id=1742283174829, alter_version=2, job_id=1742283173457
I20250318 15:40:31.350906  6496 cloud_schema_change_job.cpp:226] Begin to convert historical rowsets for new_tablet from base_tablet. base_tablet=1742283170711, new_tablet=1742283174829, job_id=1742283173457
I20250318 15:40:31.350916  6496 cloud_schema_change_job.cpp:247] schema change type, sc_sorting: 0, sc_directly: 1, base_tablet=1742283170711, new_tablet=1742283174829
I20250318 15:40:31.382493  6496 segment_creator.cpp:308] tablet_id:1742283174829, flushing rowset_dir: , rowset_id:020000000000038f6644fd8945079d22209de0cad6c7e5b8, data size:73808, index size:3289
I20250318 15:40:31.385416  6496 cloud_schema_change_job.cpp:416] process mow table|new_tablet_id=1742283174829|out_rowset_size=1|start_calc_delete_bitmap_version=3|alter_version=2
I20250318 15:40:31.387535  6496 cloud_storage_engine.cpp:894] successfully register compaction stop token for tablet_id=1742283174829, delete_bitmap_lock_initiator=6632031443518271970
I20250318 15:40:31.388285  6496 cloud_schema_change_job.cpp:439] alter table for mow table, calculate delete bitmap of incremental rowsets without lock, version: 3-2 new_table_id: 1742283174829
I20250318 15:40:31.391326  6496 cloud_schema_change_job.cpp:460] alter table for mow table, calculate delete bitmap of incremental rowsets with lock, version: 3-2 new_tablet_id: 1742283174829
I20250318 15:40:31.392035  6496 cloud_storage_engine.cpp:915] successfully unregister compaction stop token for tablet_id=1742283174829, delete_bitmap_lock_initiator=6632031443518271970
W20250318 15:40:39.947554  6496 task_worker_pool.cpp:306] failed to alter tablet|signature=1742283174829|base_tablet_id=1742283170711|new_tablet_id=1742283174829|error=[DELETE_BITMAP_LOCK_ERROR]txn conflict when commit tablet job idx { table_id: 1742283165243 index_id: 1742283165244 partition_id: 1742283165242 tablet_id: 1742283170711 } schema_change { initiator: "172.20.56.12:9050" id: "1742283173457" new_tablet_idx { table_id: 1742283165243 index_id: 1742283173458 partition_id: 1742283165242 tablet_id: 1742283174829 } txn_ids: 610474243072 alter_version: 2 num_output_rowsets: 1 num_output_segments: 1 size_output_rowsets: 77097 num_output_rows: 611 output_versions: 2 output_cumulative_point: 2 delete_bitmap_lock_initiator: 6632031443518271970 index_size_output_rowsets: 3289 segment_size_output_rowsets: 73808 }
I20250318 15:40:46.204162  7677 task_worker_pool.cpp:423] successfully submit task|type=ALTER|signature=1742283174829
I20250318 15:41:07.487172  6496 task_worker_pool.cpp:1999] get alter table task, signature: 1742283174829
I20250318 15:41:07.487183  6496 task_worker_pool.cpp:281] start alter tablet|signature=1742283174829|base_tablet_id=1742283170711|new_tablet_id=1742283174829|mem_limit=10682972209
I20250318 15:41:07.489440  6496 cloud_schema_change_job.cpp:132] Begin to alter tablet. base_tablet_id=1742283170711, new_tablet_id=1742283174829, alter_version=2, job_id=1742283173457
I20250318 15:41:07.489511  6496 cloud_schema_change_job.cpp:226] Begin to convert historical rowsets for new_tablet from base_tablet. base_tablet=1742283170711, new_tablet=1742283174829, job_id=1742283173457
I20250318 15:41:07.489523  6496 cloud_schema_change_job.cpp:247] schema change type, sc_sorting: 0, sc_directly: 1, base_tablet=1742283170711, new_tablet=1742283174829
I20250318 15:41:07.490249  6496 cloud_schema_change_job.cpp:285] Rowset [2-2] has already existed in tablet 1742283174829
I20250318 15:41:07.490275  6496 cloud_schema_change_job.cpp:416] process mow table|new_tablet_id=1742283174829|out_rowset_size=1|start_calc_delete_bitmap_version=2|alter_version=2
W20250318 15:41:07.490864  6496 cloud_compaction_stop_token.cpp:89] failed to register compaction stop token|job_id=a018587a-c12f-4926-9d7e-514ff9d88457|delete_bitmap_lock_initiator=1847151139249560285|tablet_id=1742283174829|error=[INTERNAL_ERROR]failed to start tablet job: compactions are not allowed on tablet_id=1742283174829 currently, blocked by schema change job delete_bitmap_initiator=6632031443518271970
W20250318 15:41:07.490897  6496 task_worker_pool.cpp:306] failed to alter tablet|signature=1742283174829|base_tablet_id=1742283170711|new_tablet_id=1742283174829|error=[INTERNAL_ERROR]failed to start tablet job: compactions are not allowed on tablet_id=1742283174829 currently, blocked by schema change job delete_bitmap_initiator=6632031443518271970
```