Fix System tests

[pdyraga]

For the last 5 days System Tests keep failing. All failure reasons are mostly about the infrastructure or timing issues.

We need to stabilize them.

2023-02-13
https://github.com/keep-network/tbtc-v2/actions/runs/4158928738/jobs/7194500178
Failed in system-tests-deposit-redemption in "Install Solidity dependencies" step with:

mv: cannot stat '/home/runner/work/tbtc-v2/tbtc-v2/solidity/external/npm/@keep-network/keep-core/artifacts/TokenStaking.json': No such file or directory

2023-02-12
https://github.com/keep-network/tbtc-v2/actions/runs/4153790155/jobs/7185650740
Failed in system-tests-deposit-redemption in "Install Solidity dependencies" step with:

cp: cannot create regular file '/home/runner/work/tbtc-v2/tbtc-v2/solidity/external/npm/@keep-network/keep-core/artifacts/TestModUtils.json': File exists

2023-02-11
https://github.com/keep-network/tbtc-v2/actions/runs/4148695125/jobs/7176940147
Failed in system-tests-deposit-redemption in "Install Solidity dependencies" step with:

cp: cannot create regular file '/home/runner/work/tbtc-v2/tbtc-v2/solidity/external/npm/@keep-network/keep-core/artifacts/BeaconBackportRewards.json': File exists

2023-02-10
https://github.com/keep-network/tbtc-v2/actions/runs/4139583744/jobs/7157317324
Failed in system-tests-deposit-redemption

1. System Test - Deposit and redemption
   when deposit is made and revealed
   when deposit is swept and sweep proof submitted
   "before all" hook: sweep the deposit and submit sweep proof for "should broadcast the sweep transaction on the Bitcoin network":
   Error: Electrum action failure: [tx 535f5d2b8acba1b478be80a6ebece6d90542360f5dcd7839a32c3f39935e9c36 not in block at height 2,419,483]

2023-02-08
https://github.com/keep-network/tbtc-v2/actions/runs/4119445814/jobs/7113116145
Failed in system-tests-minting-unminting in "Install Solidity dependencies" step with:

cp: cannot create directory '/home/runner/work/tbtc-v2/tbtc-v2/solidity/external/npm/@keep-network/keep-core/artifacts': File exists

[michalinacienciala]

2023-03-07
https://github.com/keep-network/tbtc-v2/actions/runs/4349250793/jobs/7598698598
Failed in system-tests-minting-unminting in "Run scenario" step with:

Error: Electrum action failure: [daemon error: DaemonError({'message': 'Transaction not found.', 'code': -1})]

This will hopefully be fixed by https://github.com/keep-network/tbtc-v2/pull/541

[michalinacienciala]

2023-03-08
https://github.com/keep-network/tbtc-v2/actions/runs/4359792319/attempts/1
Failed in system-tests-deposit-redemption with:

1. System Test - Deposit and redemption
   when deposit is made and revealed
   when deposit is swept and sweep proof submitted
   "before all" hook: sweep the deposit and submit sweep proof for "should broadcast the sweep transaction on the Bitcoin network":
   Error: Electrum action failure: [Error: failed to find the transaction block height in script hashes' histories]

and in system-tests-minting-unminting with:

1. System Test - Minting and unminting
   when minting is initiated by making and revealing a deposit to the TBTCVault
   when deposit is swept and sweep proof submitted
   "before all" hook: sweep the deposit and submit sweep proof for "should broadcast the sweep transaction on the Bitcoin network":
   Error: Electrum action failure: [Error: failed to find the transaction block height in script hashes' histories]

This was after #541 got merged to main.

[michalinacienciala]

The problems with the Electrum action failure were fixed in #606.
The rest of the problems is not related specifically to System Tests and will be tracked from now on in threshold-network/solidity-contracts#142.