Add streamtape support

[nmcc1212]

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Before submitting a pull request make sure you have:

• [x] At least skimmed through adding new extractor tutorial and youtube-dl coding conventions sections
• [x] Searched the bugtracker for similar pull requests
• [x] Checked the code with flake8

In order to be accepted and merged into youtube-dl each piece of code must be in public domain or released under Unlicense. Check one of the following options:

• [ ] I am the original author of this code and I am willing to release it under Unlicense
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this code is from https://github.com/ytdl-org/youtube-dl/pull/27670/

What is the purpose of your pull request?

• [ ] Bug fix
• [ ] Improvement
• [x] New extractor
• [ ] New feature

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Description of your pull request and other information

Add extractor for streamtape.com.

[DominikNovosel]

Assuming this works, this would be extremely useful functionality in my region. The website appears to have been changed a few days ago though, does this extractor still perform reliably?