Add regenie/step2 module

[lyh970817]

This PR adds the regenie/step2 module, which runs REGENIE Step 2 association testing from PLINK genotype inputs and Step 1 predictions.

Merge dependency: #11008.

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 - have you followed the module conventions in the contribution docs
• If necessary, include test data in your PR.
• Remove all TODO statements.
• Broadcast software version numbers to topic: versions - See version_topics
• Follow the naming conventions.
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• Follow the input/output options guidelines.
• Add a resource label
• Use BioConda and BioContainers if possible to fulfil software requirements.
• nf-core modules test regenie/step2 --profile docker
• nf-core modules test regenie/step2 --profile singularity
• nf-core modules test regenie/step2 --profile conda