chore: fix documentation and remove older test

[mastersans]

• fixed documentation regarding triaging option(removed docs for --triage-input-file flag)
• remove older test_triage.py test as newer test are present in test_vex.py
• remove older test data file related to deprecated .vex format

cc @terriko @anthonyharrison

[terriko]

Looks good! spellcheck is complaining that CDX needs to be added to the dictionary.

[terriko]

Oh, and while you're in there: looks like we could also use some entries for

  --product PRODUCT     Product Name
  --release RELEASE     Release Version
  --vendor VENDOR       Vendor/Supplier of Product
  -rr REVISION_REASON, --revision-reason REVISION_REASON

They can just point to the vex docs. We might want to consider grouping them together in a vex-flags group or something? I'm not sure how to make them easier to read in the --help output.

[mastersans]

@terriko test should be fixed now, had to reinstall to solve the freeze issue.

[terriko]

Looks good. We probably need to update the full argument list in both README and MANUAL so it matches the new actual cve-bin-tool --help output, but I'll open a separate issue for that.