Auto-import libraries based on sketch profile.

[cmaglie]

Please check if the PR fulfills these requirements

See how to contribute

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• The PR follows
  our contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)
• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

This PR changes the way libraries are imported when using sketch profiles.

What is the current behavior?

The libraries specified on profiles are "loaded" in the global state. Still, they are imported and compiled only if referenced by the sketch (or indirectly by a library imported from the sketch) after the so-called "library discovery".

What is the new behavior?

The libraries specified on profiles are always imported and compiled, even if not referenced directly or indirectly by the sketch.
This reduces the number of "library discovery" passes and slightly improves compilation times. Still, the main part of the library discovery phase remains.

Does this PR introduce a breaking change, and is titled accordingly?

It might introduce a breaking change. For example, if a library is listed in a sketch profile but not used in the sketch, after this update, the library will still be compiled, leading to a compilation failure.

Other information

[codecov]

Codecov Report

Attention: Patch coverage is 69.44444% with 66 lines in your changes missing coverage. Please review.

Project coverage is 67.99%. Comparing base (3db4ad8) to head (07d9452).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...nternal/arduino/builder/internal/detector/cache.go	70.31%	14 Missing and 5 partials ⚠️
...lder/internal/preprocessor/arduino_preprocessor.go	0.00%	16 Missing ⚠️
...rnal/arduino/builder/internal/detector/detector.go	83.63%	5 Missing and 4 partials ⚠️
...nal/arduino/builder/internal/preprocessor/ctags.go	45.45%	6 Missing ⚠️
...l/arduino/builder/internal/detector/source_file.go	88.63%	3 Missing and 2 partials ⚠️
internal/arduino/libraries/libraries_location.go	44.44%	5 Missing ⚠️
...ernal/arduino/builder/internal/preprocessor/gcc.go	33.33%	4 Missing ⚠️
commands/service_compile.go	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2951      +/-   ##
==========================================
- Coverage   68.01%   67.99%   -0.03%     
==========================================
  Files         238      239       +1     
  Lines       22567    22589      +22     
==========================================
+ Hits        15350    15360      +10     
- Misses       6015     6025      +10     
- Partials     1202     1204       +2     

Flag	Coverage Δ
unit	67.99% <69.44%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[alessio-perugini]

LGTM