fix(deps): Remove workspace files from ignore and regenerate vendor

[xperimental]

What this PR does / why we need it:

We recently changed our tooling that we use for building Loki. The new tool validates that the vendoring is "consistent" by running go mod vendor again and then committing everything (ignoring the ignore). This uncovered that there are a few files missing from the vendor directory because they are ignored in the .gitignore.

I don't think this is intentional, so this PR removes the lines from the ignores. I have also run go mod vendor again to add the missing files to the vendor directory.

Which issue(s) this PR fixes:

Special notes for your reviewer:

• An alternative would be to add ignores that just match the workspace files in the top-level (which might have been the original intention).

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Title matches the required conventional commits format, see here