Add custom registry to nfcore modules lint

[adamrtalbot]

Adds ability to set custom --registry to modules lint. Default to quay.io. Based on #2306 so requires that to be merged first.

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[codecov]

Codecov Report

Merging #2313 (f63afd2) into dev (59d2309) will decrease coverage by 0.03%.
The diff coverage is 92.85%.

@@            Coverage Diff             @@
##              dev    #2313      +/-   ##
==========================================
- Coverage   72.89%   72.87%   -0.03%     
==========================================
  Files          78       78              
  Lines        8760     8760              
==========================================
- Hits         6386     6384       -2     
- Misses       2374     2376       +2     

Impacted Files	Coverage Δ
nf_core/modules/lint/__init__.py	83.41% <85.71%> (ø)
nf_core/__main__.py	57.25% <100.00%> (+0.16%)	⬆️
nf_core/modules/lint/main_nf.py	68.28% <100.00%> (ø)

... and 3 files with indirect coverage changes