fix generate-blueprint workflow.

[mshima]

• add another priority called postInstall.
  npm install happens later at install priority, git commit happens earlier at end priority.
  Leaving no option for a task to execute between them, so a postInstall will allow to execute a npm dependency and commit the generated file to git.
• force to update the generated blueprint snapshot to catch blueprint test errors.
• fix outdated jest api.

---

Please make sure the below checklist is followed for Pull Requests.

• All continuous integration tests are green
• Tests are added where necessary
• The JDL part is updated if necessary
• jhipster-online is updated if necessary
• Documentation is added/updated where necessary
• Coding Rules & Commit Guidelines as per our CONTRIBUTING.md document are followed

When you are still working on the PR, consider converting it to Draft (below reviewers) and adding skip-ci label, you can still see CI build result at your branch.

[mraible]

@mshima Should this be a part of the next v7 release?

[mshima]

@mraible generated blueprint tests are broken, not compatible with jest 28.

[mshima]

So yes.