feat: add hgvsg option to VEP

[hassanfa]

This PR:

Added:

• --hgvsg annotation to VEP

Review and tests:

• Tests pass
• Code review
• New code is executed and covered by tests, and test approve

[hassanfa]

I noticed hgvsg annotations are missing from BALSAMIC results I received. This fixes that issue. Notice that --everything doesn't add hgvsg.

[codecov]

Codecov Report

Merging #830 (408efd5) into develop (1c3b000) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #830   +/-   ##
========================================
  Coverage    99.61%   99.61%           
========================================
  Files           29       29           
  Lines         1814     1814           
========================================
  Hits          1807     1807           
  Misses           7        7           

Flag	Coverage Δ
unittests	99.61% <ø> (ø)

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Impacted Files	Coverage Δ
BALSAMIC/constants/workflow_params.py	100.00% <ø> (ø)

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[ashwini06]

Ready to merge, with the update to changelog 👍🏼

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication