Pass machine config from Analyser and MultigridController to Context and related functions

[tieneupin]

As part of work done to implement file blacklisting (see #707 ), the machine config is already stored in the Analyser and MultigridController classes. As such, instead of making a get_machine_config_client call within the Context class or context-related functions, we can instead pass them the machine config or its values from the Analyser/MultigridController class that calls them.

[codecov]

Codecov Report

❌ Patch coverage is 93.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.85%. Comparing base (b78c905) to head (0593b80).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #761      +/-   ##
==========================================
- Coverage   48.85%   48.85%   -0.01%     
==========================================
  Files          93       93              
  Lines       10185    10182       -3     
  Branches     1326     1324       -2     
==========================================
- Hits         4976     4974       -2     
- Misses       4959     4960       +1     
+ Partials      250      248       -2     

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[stephen-riggs]

This does seem worth doing and code changes look fine to me