logic for lock requirements

[Borda]

What does this PR do?

• Replace all latest with locked versions
• In the CI we augment all requirements files by adding max version

To prepare the latest lock, run:

python .actions/assistant.py create_locked_versions

This can be also automated, to run this generation nightly, and if there is a diff, send slack msg or create PR

Does your PR introduce any breaking changes? If yes, please list them.

@awaelchli

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Did you have fun?

Make sure you had fun coding 🙃

cc @carmocca @akihironitta @Borda

[awaelchli]

Suggested change

	requires: ["oldest", "locked"]
	requires: ["oldest", "recent"]

[awaelchli]

who will update these?
See the Notion doc for a suggestion how to keep them updated.

[Borda]

in this PR it is manual, but in the following PR we can add workflow weekly generating new/actual/latest versions and there is change, it will create PR to our repo...