Provider Cache Signed Download Urls

Provider cache supports signed provider download URLs

When a provider mirror returned a signed download URL, the Provider Cache Server used the entire URL, including its query string, as the archive filename. Long authentication parameters could exceed filesystem filename limits and fail with file name too long.

Terragrunt now derives the archive filename only from the URL path while preserving the query string when downloading it. Signed provider URLs, including archives in nested object paths and relative mirror URLs, now download and cache correctly.