build: Conditionally use dotnet-runtime-8/dotnet-sdk-8 on Fedora 41

[as14692]

Description of changes:

• https://bugzilla.redhat.com/show_bug.cgi?id=2294017
• Currently credentials-fetcher requires dotnet-runtime-6 and dotnet-sdk-6
• Fedora 41 fails to install credentials-fetcher because Fedora41 does not have .NET6 support
• To support Fedora41, use dotnet-runtime-8 and dotnet-sdk-8 if the OS is Fedora 41 or later

Testing done:

Successfully built the rpm on Fedora 41 docker container, Fedora-Cloud-Base-AmazonEC2.x86_64-40 ami and al2023 ami

Merge Checklist

General

• I have read the CONTRIBUTING doc
• I used the commit message format described in CONTRIBUTING
• I have updated any necessary documentation, including READMEs and comments (where appropriate)

Tests

• [NA ] I have added tests that prove my fix is effective or that my feature works (if appropriate)
• I have checked that my tests are not configured for a specific environment

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jamolina]

Looks good. One question, were you going to update the patch version on package/credentials-fetcher.spec as well?

[as14692]

Looks good. One question, were you going to update the patch version on package/credentials-fetcher.spec as well?

Discussed offline. Will change in a release PR.

[jamolina]

Looks good, thanks @as14692 !