Improvements for type_repetition_in_bounds lint

[ThibsG]

Some improvements for type_repetition_in_bounds:

• add a configurable threshold to trigger the lint (type_repetition_in_bounds not always helps #4380). The lint won't trigger anymore if there are more bounds (strictly) than conf.max_trait_bounds on this type.
• take generic args into account over bounded type (False positive with type_repetition_in_bounds and generics #4323)
• don't lint for predicates generated in macros (type_repetition_in_bounds should not trigger on macro-generated code #4326)

Fixes #4380,
Fixes #4323,
Fixes #4326,
Closes #3764

changelog: Fix multiple FPs in type_repetition_in_bounds and add a configuration option

Note: the #3764 has already been fixed but not closed

[rust-highfive]

r? @flip1995

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[flip1995]

Thanks! waiting for rustup

[flip1995]

@ThibsG you will need to rebase and change every Late{LintPass,Context}<'_, '_> -> Late{LintPass,Context}<'_> (remove the first LT parameter)

[ThibsG]

Actually simple rebase did the job

[flip1995]

@bors r+

[bors]

📌 Commit 2d5930a has been approved by flip1995

[bors]

⌛ Testing commit 2d5930a with merge fff8e72...

[bors]

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: flip1995
Pushing fff8e72 to master...