Add ability to use czbiohub_aws config

[olgabot]

czbiohub/sc2-illumina-pipeline pull request

This PR adds the ability to access the configs listed at nf-core/configs, including czbiohub_aws:

nextflow run czbiohub/sc2-illumina-pipeline -profile test,czbiohub_aws -with-tower

We can also add/update configurations as necessary

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 necessary, also make a PR on the czbiohub/sc2-illumina-pipeline branch on the nf-core/test-datasets repo
• Ensure the test suite passes (nextflow run . -profile test,docker).
• Make sure your code lints (nf-core lint .).
• Documentation in docs is updated
• CHANGELOG.md is updated
• README.md is updated

Learn more about contributing: CONTRIBUTING.md