Track from where modules and subworkflows are installed

[mirpedrol]

Track from where modules and subworkflows are installed.

• a module installed with nf-core modules install: "modules"
• a subworkflow installed with nf-core subworkflows install: "subworkflows"
• a module or subworkflow installed automatically when installing another subworkflow: ""

Updates modules.json file adding a new field installed for every module/subworkflow
💭 With previously installed modules/subworkflows, it assumes they were installed by an nf-core command, without taking into account if they are used by other subworkflows.

I also fix some small bugs that I found on the way.

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 #1999 (a5073fa) into dev (1e36a4f) will decrease coverage by 0.04%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##              dev    #1999      +/-   ##
==========================================
- Coverage   63.15%   63.11%   -0.05%     
==========================================
  Files          43       43              
  Lines        4951     4945       -6     
==========================================
- Hits         3127     3121       -6     
  Misses       1824     1824              

Impacted Files	Coverage Δ
nf_core/components/components_create.py	74.76% <ø> (-0.24%)	⬇️
nf_core/components/components_install.py	78.84% <75.00%> (-1.86%)	⬇️

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