Inject package metadata from registry for older versions

[s1gr1d]

Problem Statement

@inject packages.checksum or @inject packages.version only return data for the latest version. But on some pages (like pluggable integrations here), we want to show the setup with v7.

This is not super urgent as we can hardcode this right now as the latest version of v7 is not changing often.

Also see this PR: #10874

Solution Brainstorm

Adding an optional version parameter for the checksum and the version (to get a specific, and not the latest version)

[chargome]

partly related to #3881

[stephanie-anderson]

Decided not to implement something for this, as it seems this is not required all too often. Please reopen, if hardcoding that information does not work for you