Update FIBContext and backend logic for detecting, handling and making GIFs of drift correction images

[tieneupin]

This PR updates the logic on the client and backend server used to construct GIFs of the drift correction images.

• Creates and stores the output GIF file path once per site on the client side instead of reconstructing it each time on the server side
• Uses the site info metadata parsed from the 'ProjectData.dat' file to determine the output GIF file path
• Removes timestamp extraction logic, as the AutoTEM's drift correction images are automatically generated with the timestamp in the file name in yyyy-mm-dd-hh-mm-ss convention, which allow them to be sorted as strings
• Adds logic to skip sending GIF creation requests if the metadata is not yet parsed, sending it only after the corresponding metadata information has been collected
• Simplifies the API endpoint URL path and the parameters that need to be passed to the backend

Diff due to tests is about +270/-110.

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 52.29%. Comparing base (42a34ba) to head (b27e198).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #796      +/-   ##
==========================================
+ Coverage   52.14%   52.29%   +0.15%     
==========================================
  Files          96       96              
  Lines       10239    10316      +77     
  Branches     1340     1357      +17     
==========================================
+ Hits         5339     5395      +56     
- Misses       4627     4642      +15     
- Partials      273      279       +6     

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