Add answer relevancy models and integrate into analysis workflow #2570

Job	Run time
Lint JavaScript	16s
Lint ERB / Run ErbLint	12s
Lint SCSS / Run Stylelint	21s
Security Analysis / Run Brakeman	22s
Dependency Review scan / dependency-review-pr	6s
Lint Ruby / Run RuboCop	18s
Test JavaScript / Run Jasmine	47s
Test Ruby / Run RSpec	3m 19s
CodeQL SAST scan / Analyze	1m 56s
Dependency Review scan / dependency-review-push	0s
	7m 37s

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