feat: use and update external cache

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.20594% with 32 lines in your changes missing coverage. Please review.

Project coverage is 81.03%. Comparing base (e9d149f) to head (41d8081).

Files	Patch %	Lines
.../blockifier/src/transaction/account_transaction.rs	95.66%	0 Missing and 11 partials :warning:
crates/blockifier/src/transaction/transactions.rs	76.47%	7 Missing and 1 partial :warning:
...es/blockifier/src/blockifier/stateful_validator.rs	63.63%	0 Missing and 4 partials :warning:
...lockifier/src/execution/deprecated_syscalls/mod.rs	84.21%	3 Missing :warning:
.../blockifier/src/blockifier/transaction_executor.rs	90.90%	1 Missing and 1 partial :warning:
crates/native_blockifier/src/py_block_executor.rs	0.00%	2 Missing :warning:
...lockifier/src/transaction/transaction_execution.rs	90.90%	0 Missing and 1 partial :warning:
crates/native_blockifier/src/py_validator.rs	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## native2.6.4 #109 +/- ## =============================================== + Coverage 80.63% 81.03% +0.40% =============================================== Files 77 77 Lines 10587 10880 +293 Branches 10587 10880 +293 =============================================== + Hits 8537 8817 +280 - Misses 1584 1588 +4 - Partials 466 475 +9 ```

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[rodrigo-pino]

@DomHenderson can you point me here the Juno branch that allows this changes to make sense