[Execution] Add simple check to commit_blocks_ext.
[Execution] Add simple check to commit_blocks_ext.

aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core