Fix matrix_locations when used in pbf request

[dnesbitt61]

Issue

fixes #3996

Needed to use one_of in options.proto and check has_matrix_locations_case() in the else case so we do not overwrite a properly set matrix_locations value in the incoming pbf request.

Tasklist

• Add tests
• Add #fixes with the issue number that this PR addresses
• Update the docs with any new request parameters or changes to behavior described
• Update the changelog
• If you made changes to the lua files, update the taginfo too.

Requirements / Relations

Link any requirements here. Other pull requests this PR is based on?

[nilsnolde]

Ah nice, you're the first known (to me) to use the PBF interface!

I'm indifferent to changelog.

[kevinkreiser]

if its not too much trouble i think bug fixes are very good candidates for the changelog.

pbf support is a first class citizen, i can tell you that huge numbers of people rely on it daily.