Pass the full project path for resolve buttons

Phil Hughes requested to merge resolve-buttons-path into master

What does this MR do?

The full project path is passed from the HTML into the JS rather than the resolve button JS generating the URL based on the the namespaces.

@smcgivern @stanhu Do we have anyway of adding tests for installs with relative URLs?

What are the relevant issue numbers?

Closes #21704 (closed)

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