[master] Disable creating service users in domains

[mergify]

This is an automatic copy of pull request #5076 done by Mergify.

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🆔 Reference related issue.

AM-4194

✏️ A description of the changes proposed in the pull request

This PR removes the serviceAccount field from new user model to disallow creating service accounts on domain level.
Service accoutns should only be used in organisation context.

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Cherry-pick of b5ef44e has failed:

On branch mergify/bp/master/pr-5076
Your branch is up to date with 'origin/master'.

You are currently cherry-picking commit b5ef44e807.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   gravitee-am-management-api/gravitee-am-management-api-service/src/main/java/io/gravitee/am/management/service/impl/AbstractUserService.java
	modified:   gravitee-am-management-api/gravitee-am-management-api-service/src/main/java/io/gravitee/am/management/service/impl/OrganizationUserServiceImpl.java
	modified:   gravitee-am-service/src/main/java/io/gravitee/am/service/model/AbstractNewUser.java
	modified:   gravitee-am-service/src/main/java/io/gravitee/am/service/model/NewOrganizationUser.java

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   gravitee-am-management-api/gravitee-am-management-api-rest/src/test/java/io/gravitee/am/management/handlers/management/api/resources/UsersResourceTest.java

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

Cherry-pick of b5ef44e has failed:

On branch mergify/bp/master/pr-5076
Your branch is up to date with 'origin/master'.

You are currently cherry-picking commit b5ef44e807.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   gravitee-am-management-api/gravitee-am-management-api-service/src/main/java/io/gravitee/am/management/service/impl/AbstractUserService.java
	modified:   gravitee-am-management-api/gravitee-am-management-api-service/src/main/java/io/gravitee/am/management/service/impl/OrganizationUserServiceImpl.java
	modified:   gravitee-am-service/src/main/java/io/gravitee/am/service/model/AbstractNewUser.java
	modified:   gravitee-am-service/src/main/java/io/gravitee/am/service/model/NewOrganizationUser.java

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   gravitee-am-management-api/gravitee-am-management-api-rest/src/test/java/io/gravitee/am/management/handlers/management/api/resources/UsersResourceTest.java

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[sonarcloud]

Quality Gate failed

Failed conditions
33.33% Condition Coverage on New Code (required ≥ 50%)

See analysis details on SonarCloud