Replace opensubtitlescom _search recursion with a generator implementation

[Johnnynator]

It can happen that a opensubtitlescom query might return hundreds of
pages, this can lead to a stackoverflow (especially on systems with a
smaller default thread stack size like musl libc)

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
src/subliminal/providers
opensubtitlescom.py
Project Total

This report was generated by python-coverage-comment-action

[getzze]

Thanks for the PR!
I added some suggestions to simplify the code.

[getzze]

To mitigate this bug, since version 2.5.0 you can limit the number of pages: #1332

[Johnnynator]

To mitigate this bug, since version 2.5.0 you can limit the number of pages: #1332

Thx for the info, I was aware of it and thought about just setting a default page limit. But not doing (deep) recursion in a language that doesn't do tail call elimination sounded like a better way :)

I replaced the usage of allow_more_pages, total_pages_reached, and abort with a break statement

[getzze]

Can you add a changelog entry, please?
You can use the following command (I let you put the description) and then commit the created file:

towncrier create -c "DESCRIPTION" 1336.provider.rst

[Johnnynator]

Added changelog.d/1336.provider.rst

[getzze]

Thank you for your contribution!