feat(pip_setup): Add JavaScript-based implementation

[zharinov]

Changes:

Use @renovate/parser-utils for more lightweight manager implementation.

Context:

Closes #10090

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please tick one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[zharinov]

Test repos:
https://github.com/renovate-testing/test-10090-1-sertit-utils
https://github.com/renovate-testing/test-10090-2-python-slack-sdk
https://github.com/renovate-testing/test-10090-3-azure-functions-python-worker
https://github.com/renovate-testing/test-10090-4-SPT
https://github.com/renovate-testing/test-10090-5-ctfile
https://github.com/renovate-testing/test-10090-6-aicsimagei

[rarkins]

Needs documentation and also can we switch to using re2 for regex to avoid any catastrophic failures?

[viceice]

Use RE2 for regexp if possible. 😉

[zharinov]

I think it's good enough for initial release

[viceice]

Bump external dep to v1.0.0 first

[zharinov]

We're planning to release this library as a separate entity, which I aim to develop and support on my own.  I'd prefer to bump it to '0.1.0' instead, and then upgrade to 0.2.x, 0.3.x, and so on until it appears to be suitable for general use. Though, Renovate will benefit from its earlier versions.

[rarkins]

@zharinov I thought about it more, and I still want the parser utils to be 1.0.0, which represents production-ready. It doesn't matter to me if you end up getting to v10 or whatever quickly - major releases should be unemotional

[rarkins]

Bump dep to 1.0.0

[zharinov]

Works good with real repo

[renovate-release]

🎉 This PR is included in version 29.4.0 🎉

The release is available on:

• GitHub release
• 29.4.0

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