updated stringtie

[khersameesh24]

PR updates StringTie to the latest version (v3.0.3)

• added support for long, mix and expression-estimation modes
• added nf-test test cases
• updated container images

PR checklist

Closes #11831

• [✔️] 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.
• [✔️] Follow the parameters requirements.
• Follow the input/output options guidelines.
• Add a resource label
• [✔️] Use BioConda and BioContainers if possible to fulfil software requirements.
• Ensure that the test works with either Docker / Singularity. Conda CI tests can be quite flaky:
  • For modules:
    • [✔️] nf-core modules test <MODULE> --profile docker
    • [✔️] nf-core modules test <MODULE> --profile singularity
    • [✔️] nf-core modules test <MODULE> --profile conda
  • For subworkflows:
    • [✔️] nf-core subworkflows test <SUBWORKFLOW> --profile docker
    • [✔️] nf-core subworkflows test <SUBWORKFLOW> --profile singularity
    • [✔️] nf-core subworkflows test <SUBWORKFLOW> --profile conda

[SPPearce]

Why is this here?

[khersameesh24]

nf-core modules lint raises an error for invalid meta values found. I think strandedness should be passed with the meta map as these values differ per sample. I moved it to the config to fix linting errors