Change superclass for InferredSpecType

[bquorning]

This copies some of the code from the RuboCop::RSpec::Language module in rubocop-rspec, and it no longer allows the user to configure aliases for example group methods (describe, fcontext, xfeature etc.).

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Before submitting the PR make sure the following are checked:

• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• Added tests.
• Updated documentation.
• Added an entry to the CHANGELOG.md if the new code introduces user-observable changes.
• The build (bundle exec rake) passes (be sure to run this locally, since it may produce updated documentation that you will need to commit).

[bquorning]

Perhaps this does warrant a mention in the changelog?

[ydah]

it no longer allows the user to configure aliases for example group methods

Hmm. Users using RSwag may be in trouble. Users using RSwag and using rubocop-rspec can find it in Issue.
https://github.com/rubocop/rubocop-rspec/issues?q=is%3Aissue+rswag+is%3Aclosed

[pirj]

Is it worth the tradeoff? We’re not only limiting current cops from being able to confidently focus their inspection to examples/example groups, but any future cops, too.

This is the first step towards dropping the dependency on rubocop-rspec. But why?

[bquorning]

🤔 I guess you’re right, as long as we keep a runtime dependency on rubocop-rspec, it should be ok to inherit from ::RuboCop::Cop::RSpec::Base.

Should I close this PR again?

[pirj]

I think so, yes.