fix: update scripts (kkrt-labs#565)

<!--- Please provide a general summary of your changes in the title
above -->
An error caused the deployment script to crash when missing an evm
private key in the .env file.

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days. Did you spend 0.5 days on this PR or rather 2 days? -->

Time spent on this PR: N/A

## Pull request type

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pull requests if needed. -->

Please check the type of change your PR introduces:

- [x] Bugfix
- [ ] Feature
- [ ] Code style update (formatting, renaming)
- [ ] Refactoring (no functional changes, no api changes)
- [ ] Build related changes
- [ ] Documentation content changes
- [ ] Other (please describe):

## What is the current behavior?

<!-- Please describe the current behavior that you are modifying, or
link to a relevant issue. -->
Error in script prevents CI deployment of contracts.

Resolves N/A

## What is the new behavior?

<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Scripts are updated in order to allow deployment with missing evm
private key.

scripts/constants.py

@@ -14,9 +14,12 @@
 
 ETH_TOKEN_ADDRESS = 0x49D36570D4E46F48E99674BD3FCC84644DDD6B96F7C741B1562B82F9E004DC7
 EVM_PRIVATE_KEY = os.getenv("EVM_PRIVATE_KEY")
-EVM_ADDRESS = keys.PrivateKey(
-    bytes.fromhex(EVM_PRIVATE_KEY[2:])
-).public_key.to_checksum_address()
+EVM_ADDRESS = (
+    EVM_PRIVATE_KEY
+    and keys.PrivateKey(
+        bytes.fromhex(EVM_PRIVATE_KEY[2:])
+    ).public_key.to_checksum_address()
+)
 NETWORK = os.getenv("STARKNET_NETWORK", "starknet-devnet")
 NETWORK = (
     "testnet"

scripts/deploy_kakarot.py

@@ -3,15 +3,15 @@
 from math import ceil, log
 
 from scripts.constants import CHAIN_ID, EVM_ADDRESS, GATEWAY_CLIENT
-from scripts.utils import (
+from scripts.utils.starknet import (
     declare,
     deploy,
     deploy_and_fund_evm_address,
     dump_declarations,
     dump_deployments,
-    get_account,
     get_declarations,
     get_eth_contract,
+    get_starknet_account,
     invoke,
 )
 
@@ -25,7 +25,7 @@ async def main():
         f"ℹ️ Connected to CHAIN_ID {CHAIN_ID.value.to_bytes(ceil(log(CHAIN_ID.value, 256)), 'big')} "
         f"with GATEWAY {GATEWAY_CLIENT.net}"
     )
-    account = await get_account()
+    account = await get_starknet_account()
     logger.info(f"ℹ️ Using account {hex(account.address)} as deployer")
 
     class_hash = {