conftest: add input arg for run_cli_command, fix typings

[dev-zero]

Additional arg "input" may be needed when testing interactive commands. For the typings: PEP484 mandates explicit Optional for optional args.

[dev-zero]

To convert the unittests in my plugin to fixture-based (instead of the deprecated aiida test class) I copied the run_cli_command. Maybe the added input I needed is important to someone else who does testing of interactive cli.
What do you think about making those fixtures available as pytest plugins?

[codecov]

Codecov Report

Merging #5175 (69c79e4) into develop (ddad09c) will increase coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #5175      +/-   ##
===========================================
+ Coverage    80.90%   80.92%   +0.03%     
===========================================
  Files          536      536              
  Lines        37054    37054              
===========================================
+ Hits         29975    29984       +9     
+ Misses        7079     7070       -9     

Flag	Coverage Δ
django	75.78% <ø> (+0.03%)	⬆️
sqlalchemy	74.93% <ø> (+0.03%)	⬆️

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Impacted Files	Coverage Δ
aiida/orm/nodes/process/calculation/calcjob.py	78.00% <0.00%> (+0.96%)	⬆️
aiida/engine/processes/calcjobs/tasks.py	65.78% <0.00%> (+1.01%)	⬆️
aiida/engine/processes/calcjobs/manager.py	86.73% <0.00%> (+3.54%)	⬆️

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[chrisjsewell]

Heya, FYI, I actually have done similar in #5172 (I missed this PR!):

aiida-core/tests/conftest.py

Line 431 in d5bf71e

def _run_cli_command(command: click.Command, options: list = None, raises: bool = False, **kwargs) -> Result:

It also handles catch_exceptions = False, which was present in the original AiidaTestCase

[sphuber]

Thanks @dev-zero . As @chrisjsewell mentioned, I had already added this in #5111 which was merged today. I included your changes for the typing. So I am closing this PR.