Merge method variants into parameterised components

[rcannood]

Describe your changes

Merges the 16 method variant components into 4 parameterised components, and makes run_benchmark paramset-aware as per the results_v4 schema.

• methods/cycombine, methods/cytonorm (--controls, --target), methods/batchadjust (--controls) and methods/rpca (--target) replace the *_all_controls*/*_no_controls*/*_one_control*/*_to_goal/*_to_mid variants. The scripts are call-for-call identical to the old variants (verified bit-identical outputs).
• Each component declares its parameter sets as info.variants. run_benchmark runs each parameterised method once per paramset and tags every score with paramset_name/paramset (null for non-parameterised methods), matching common/schemas/results_v4/results.json.
• The paramsets can be overridden with a new optional --paramsets yaml file argument; a method without info.variants is run once with its default parameter set.
• --methods_include/--methods_exclude can now also target a single paramset as <method_id>.<paramset_name>.
• Paramset helper functions live in src/workflows/run_benchmark/paramset_helper.nf.

Verified via viash test on all four components, standalone runs of every non-default branch, and full local run_benchmark runs on the test resources -- both with the default info.variants and with a custom --paramsets file.

Note: cycombine.no_controls_to_goal and cycombine.one_control_to_goal misbehave on the test dataset (ComBat crash / NaNs). This is pre-existing behaviour of the old variant components, unrelated to this PR.

Checklist before requesting a review

• I have performed a self-review of my code

• Check the correct box. Does this PR contain:

  • Breaking changes
  • New functionality
  • Major changes
  • Minor changes
  • Bug fixes

• Proposed changes are described in the CHANGELOG.md

• CI Tests succeed and look good!