Update cellranger multi module to comply to nf-core guidelines

[mahesh-panchal]

Description

• Removes task.ext.force_include_frna :- Part of [FEATURE] Update modules to remove undocumented task.ext fields #8716 - Revert Fix logic to accept singplex flex libraries in cellranger_multi #10922
• Refactors python script to Groovy/Bash since the python script wraps a command-line call.
• Renames meta_* to meta\d? to conform to nf-core guidelines
• Updates topic emission to use eval
• Makes a copy of fb_reference to fix bug in CELLRANGER_MKVDJREF and CELLRANGER_MULTI failing in the tests scrnaseq#529 (comment)
• Removes empty file from tests and uses [] for optional files.
• Removes missing file from test.
• Updates test config to conform to nf-core guidelines.

TODO

• Refactor out meta?.options to conform to nf-core guidelines
• Check file staging logic. Currently matches test input.

PR checklist

Closes #XXX

• 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