Release PR contains wrong Prebuilt archive version

[premun]

Context

When we create a dotnet/installer PR at the end of the release pipeline, we are updating also the version of the Source Build prebuilt archive which was uploaded earlier in the pipeline to a storage account. This version is derived from the SDK version we're releasing but the actual version can differ as it comes from the VMR build that has a different number.

Goal

When we download the prebuilt archive, we match the downloaded file by globbing (*) so we don't care about the exact version which might differ from the version of the currently released SDK.
We should remember the name of the uploaded file and later on, when opening the PR, use this exact name so that we're sure the URL works.

[premun]

Possible a duplicate of #3344