* Find and load missing programs in LoadedPrograms cache
- filter program accounts in a transaction batch
- filter the accounts that are missing in LoadedPrograms cache
- load the programs before processing the transactions
- unit tests
* address review comments
* fix clippy
* address review comments
* fix test
* fix more tests
* Use three separate HashMaps instead of the enum TxBankExecutorCacheDiff.
* Replaces all places which deploy programs by a macro.
* Adds a feature gate.
* Adjust tests.
* Makes undeployment visible immediately.
* Moves CreateMetrics into the program-runtime crate.
* Moves the Executor trait into executor.rs
* Removes the first_instruction_account parameter from Executor::execute().
* Moves CachedExecutors, related structs, consts and tests into the program-runtime crate.
* Moves TransactionExecutor, related enum and type defs into executor_cache mod.
Pankaj Garg
Alexander Meißner
Trent Nelson