Improve neotest to serve coverage needs

[AnnaShaleva]

1. Bind neotest.AddSystemFee and neotest.TestInvoke to Executor state.
2. Calculate system fee for deployment transactions.

Reasons are explained in the commit messages. @roman-khimov, these commits made in a breaking way, but if we care about our users a lot, then I can mark related methods as "deprecated" and introduce new Executor methods in a soft way. Do we?

A ground for #3462.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.05%. Comparing base (ffcbe6a) to head (72d1427).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3551 +/- ## ========================================== + Coverage 86.04% 86.05% +0.01% ========================================== Files 330 330 Lines 38674 38675 +1 ========================================== + Hits 33276 33282 +6 + Misses 3853 3848 -5 Partials 1545 1545 ```

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