Transport: unify the behavior of core.ssh_async::glob with core.ssh::glob

[khsrali]

Fixes #6949

This PR suggest two changes in core.ssh_async interface:

• catch and raise a better error message if the connection fails to open
• globing of a non-existing path or an unmatched pattern will not raise anymore, instead it will just returns an empty list. This is to respect the same convention of core.ssh behavior

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.18%. Comparing base (b235b3a) to head (df42da7).

Files with missing lines	Patch %	Lines
src/aiida/transports/plugins/ssh_async.py	71.43%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6950      +/-   ##
==========================================
- Coverage   79.20%   79.18%   -0.01%     
==========================================
  Files         566      566              
  Lines       43461    43470       +9     
==========================================
- Hits        34417    34416       -1     
- Misses       9044     9054      +10     

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[mbercx]

Thanks @khsrali! I'll give a spin and do a proper review on Monday, have some scientific tasks to take care of today. 😉