feat: outside execution: add estimate fees and simulate

[PhilippeR26]

Motivation and Resolution

Solves issue #1263 .
User are requesting to add functions for executors of SNIP-9 outside executions, allowing them to estimate the fees they will have to pay and to simulate a SNIP-9 transaction.

Usage related changes

Estimate fees for an outside execution:

On executor side, if you want to estimate how many fees you will pay:

const outsideExecutionCall: Call[] =
  outsideExecution.buildExecuteFromOutsideCall(outsideTransaction1);
const estimateFee = await executorAccount.estimateFee(outsideExecutionCall);

Simulate an outside execution:

On executor side, if you want to simulate the transaction:

const outsideExecutionCall: Call[] =
  outsideExecution.buildExecuteFromOutsideCall(outsideTransaction1);
const invocations: Invocations = [
  {
    type: TransactionType.INVOKE,
    payload: outsideExecutionCall,
  },
];
const responseSimulate = await executorAccount.simulateTransaction(invocations);

Development related changes

• a function outsideExecution.buildExecuteFromOutsideCall() has been added to create a Call. Then this Call can be used in the standard functions for estimateFee and simulate.
• this new function allows some refactors in code & tests.

Checklist:

• Performed a self-review of the code
• Rebased to the last commit of the target branch (or merged it into my branch)
• Linked the issues which this PR resolves
• Documented the changes in code (API docs will be generated automatically)
• Updated the tests
• All tests are passing