Poetry versioning should auto fallback to pep440 if no valid semver

[viceice]

What would you like Renovate to be able to do?

Renovate poetry versioning should automatically fallback to pep440 versioning if the current version isn't a semver compatible version.

Did you already have any implementation ideas?

No, it's a little complicated for ranges. eg project lupa = "^1.8" and lock file version = "1.9" so:

• it's not pep440 because of caret
• it's not semver because of short version

ref: #8740, #8742

[github-actions]

This issue has been labeled with status:requirements. This indicates that we don't know enough to start work and further requirements or a reproduction are needed first.

This label will be replaced with status:ready once all requirements and reproductions necessary to start work have been met.

If it's not clear what is missing to move this issue forward, ask for clarification in a new comment. If you think we already have what we need to move forward, mention this in a new comment.