TBD: How can we ensure that migrations were completed **before**
updating user-charts
## What this PR does
This PR removes logic for user apps versioning.
It is not needed anymore for new dashboard and does not make sence for
cozystack-api server, which always validates values accourding to the
latest spec from CozystackResourceDefinition.
### Release note
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```release-note
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## Summary by CodeRabbit
- Chores
- Removed legacy version maps and packaging scripts (including
gen_versions_map and package_chart); pre-commit hook for versions
removed.
- Makefiles updated to unified chart discovery and shared env includes;
logo copy step removed and installer image no longer bundles logos.
- Many charts’ version fields replaced with build-time placeholders
(0.0.0); appVersion metadata added.
- Refactor
- Added standardized fix-charts and repo targets for packaging.
- HelmRelease defaults tightened: explicit version constraints, longer
intervals/timeouts, remediation retries, and upgrade.force.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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