Track blueprint support for v8.7.2/v8.8.0 release.

[mshima]

Overview of the feature request

Issues found in v8.7.1 release:

• generator-jhipster/eslint exported does not work correctly.
  Workaround: cleanup exported object
  Fixed in fix eslint exports #27359
• internal: if a blueprint overrides a main command with choices removed, preparation logic will not prepare missing choices and fail to render templates.
  Example: pulsar removed
  Workaround: manually add missing properties
  Fixed in internal: always load main generators configs #27466 (comment)
• internal: if a command defines a choice with null value, preparation logic will override the property actual actual value.
  Example: null value
  Fixed in: d8f6b2e
  Workaround: may be possible to move choices to prompt if not affected by above issue.
• git: may fail to commit with pre commit hook, execute git with --no-verify.
• testing: allow helpers.runCli() and helpers.runJDL() to be used by blueprints. Testing configuration needs to be added to test to allow blueprint use case.
• testing: replace withParentBlueprintLookup() with testing configuration.
• testing: regression in helpers blueprint option, it doesn't accepts string.
  Workaround: convert to array.
  Fixed in 211b129
• liquibase: generating fake date fails with invalid changelog see Faker 9 breaking changes are not resolved. #27367

Nice to have:

• add ionic project-name generator use case to main generator. project-name: make it configurable by options #27545

Motivation for or Use Case

Related issues or PR

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