Fix magic link summary

[facutuesca]

This PR fixes a few issues in the magic link nudge logic:

1. Part of the nudge is printed in the summary even if Trusted Publishing is used
2. The summary message includes the ::warning... tag, which only works for the logs, not for the summary
3. The summary message does not include the magic links

See this job for an example of all 3 issues. The workflow uses Trusted Publishing, but the nudge is still included in the summary, with the ::warning tag and no magic links.

This PR fixes the issues by:

• Not adding the nudge to the job summary when using Trusted Publishing
• Constructing the summary without the ::warning tag
• Adding the magic links to the summary

cc @woodruffw @webknjaz

[webknjaz]

Thanks, this looks great!

[webknjaz]

See this job

By the way, you really shouldn't give the transitive build deps access to OIDC...