Word alignment Refinement

[Enkidu93]

Most of this is John's work. This PR needs to be approved to enable running the E2E tests in Serval.

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This change is 

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 80.00000% with 12 lines in your changes missing coverage. Please review.

Project coverage is 88.30%. Comparing base (6de035f) to head (e862df2).

Files with missing lines	Patch %	Lines
machine/jobs/word_alignment_file_service.py	57.89%	8 Missing ⚠️
machine/corpora/parallel_text_corpus.py	88.23%	2 Missing ⚠️
machine/jobs/shared_file_service_base.py	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #151      +/-   ##
==========================================
- Coverage   88.33%   88.30%   -0.04%     
==========================================
  Files         275      275              
  Lines       16192    16235      +43     
==========================================
+ Hits        14304    14337      +33     
- Misses       1888     1898      +10     

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[johnml1135]

Reviewed 10 of 10 files at r1, 2 of 2 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ddaspit)