[jsinterp] Support YT player 590f65a6

[dirkf]

Boilerplate: own/yt-dlp code, fix/improvement

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• You will be asked some questions, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your pull request (like that [x])
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Before submitting a pull request make sure you have:

• Searched the bugtracker for similar pull requests
• Read adding new extractor tutorial
• Read youtube-dl coding conventions and adjusted the code to meet them
• Covered the code with tests (note that PRs without tests will be REJECTED)
• 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, except for code from yt-dlp for which this or the below has been asserted.
• I am not the original author of this code but it is in public domain or released under Unlicense (provide reliable evidence)

What is the purpose of your pull request?

• Bug fix
• Improvement
• New extractor
• New feature

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Description of the pull request

YT player 590f65a6 revealed a bug in arithmetic evaluation in the JSInterpreter module. The PR corrects this and also makes a previously failing proposed test work; resolves #32815.

The bug also revealed some incomplete or inadequate back-porting:

• following yt-dlp, orig_msg is now set in ExtractorError
• an invalid integer format in an error message was changed to !r

To assist in resolving the problem, yt-dlp's interpreter Debugger was back-ported.

There are some further JSInterpreter tweaks and a fix for a new linter rule in an unrelated extractor module.