* Add deprecated tag to Bank::get_blockhash_last_valid_slot
* Update SendTransactionService to use last_valid_block_height
* Update solana-tokens to use last_valid_block_height
* Remove dangling file
* Update solana program to use last_valid_block_height
* Update Banks crates to use last_valid_block_height
* Add optimistically_confirmed field to TransactionStatus
* Update docs
* Convert new field to confirmation_status
* Update docs to confirmationStatus
* Update variants
* Update docs
* Just Confirmed