Add organization to main.nf.test tag instead of using nfcore

[nvnieuwk]

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

Fixes #2979

In custom modules repositories, the main.nf.test file contains the modules_nfcore tag (which doesn't really make sense). This PR updates this by doing the following steps:

1. Update nf-core modules create and nf-core subworkflows create to add the modules_<organization tag instead of the modules_nfcore tag
2. Update nf-core modules lint to make sure it passes the linting check

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.11%. Comparing base (b06712a) to head (a4ecb70).

Additional details and impacted files

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[nvnieuwk]

Thanks for the reviews!