Added skip_warning ability to deprecators for tests

[keshavbiswa]

Motivation / Background

Fixes: #2948

This Pull Request has been created because We want the ability to silence output warnings for Deprecated Generators in tests.

Checklist

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• This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
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[stefannibrasil]

This LGTM, thank you!

@thdaraujo could you give a review when you can? Thanks!

[thdaraujo]

This is just for our own testing purposes, right?

If yes, then it looks good to me - but left a suggestion so we don't use a class variable.

And Faker::Theater still displays a warning, not sure why.

[keshavbiswa]

@thdaraujo Thanks, I'll take a look at your suggestion and also figure out why you're seeing the deprecation message.

[keshavbiswa]

@thdaraujo @stefannibrasil I have fixed the issue and have updated your requested changes.