Update raven: topic versions, stub block, sanitizeOutput

[HReed1]

PR checklist

• This comment contains a description of changes (with reason).
• If you've fixed a bug or added code that should be tested, add tests!
• If you've added a new tool, add --profile docker,wave tests.
• Make sure your code lints (nf-core modules lint).
• Ensure the test suite passes (nf-test test).

Description of changes

Migrates the raven module to the nf-core v4.0.1 architecture:

• topic: versions: Replaced legacy versions.yml file emission with dynamic eval() tuple emission on the topic: versions channel.
• stub block: Added a deterministic stub: block for CI/CD stub-run support.
• sanitizeOutput: Refactored all test assertions to use sanitizeOutput(process.out) per nf-test best practices.
• meta.yml: Updated to include both output: versions_raven and topics: versions sections.

Part of the v4.0.1 standardization effort tracked in #11323.

Part of #4570