Changed retrieval of location hardware in the SSHConnector class

[LanderOtto]

This commit introduces some changes in the SSHConnector class:

• remove the hardwareCache attribute
• improve the performance creating tasks through the asyncio.create_task function to retrieve the hardware of each location. Before this commit, the hardware retrieval of each location was done sequentially.
• reduce the number of remote communications to retrieve location hardware. Before this commit, there were five communications, now only one.
• reduce the number of remote communications to check for existing directories in one communication, instead of initiating a dedicated communication for each directory

[codecov]

Codecov Report

Attention: Patch coverage is 89.74359% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 70.09%. Comparing base (eba599c) to head (695e8ef).

Files	Patch %	Lines
streamflow/deployment/connector/ssh.py	89.74%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #424      +/-   ##
==========================================
- Coverage   70.11%   70.09%   -0.02%     
==========================================
  Files          83       83              
  Lines       10564    10567       +3     
  Branches     2496     2499       +3     
==========================================
  Hits         7407     7407              
- Misses       2702     2704       +2     
- Partials      455      456       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.