Fix EmbeddedAnsible ScmCredential parent class

[agrare]

All EmbeddedAnisble credentials should derive from the EmbeddedAnsible::AutomationManager::Credential class.

This was causing issues with displaying all Embedded Ansible credentials by doing ManageIQ::Providers::EmbeddedAnsible::AutomationManager::Credential.all specifically in the UI.

Dependents:

• Fix parent class for Workflows ScmCredential manageiq-providers-workflows#32

[miq-bot]

Checked commit agrare@1595ebd with ruby 2.6.10, rubocop 1.28.2, haml-lint 0.35.0, and yamllint
2 files checked, 0 offenses detected
Everything looks fine. 🍪

[Fryguy]

I don't love the mixin, but i see why it's needed as it's the only way to "share" the ScmCredential code with workflows while maintaining 2 independent hierarchies.

[agrare]

I don't love the mixin

Yeah I agree which is why I avoided it initially, but if we want to share "SCM" type params while keeping two different class hierarchies I don't see another option.

[Fryguy]

@agrare A conflict occurred during the backport of this pull request to petrosian.

If this pull request is based on another pull request that has not been marked for backport, add the appropriate labels to the other pull request. Otherwise, please create a new pull request direct to the petrosian branch in order to resolve this.

Conflict details:

* Unmerged path app/models/manageiq/providers/embedded_automation_manager/scm_credential.rb

[Fryguy]

Backported to petrosian in commit 013f3d1.

commit 013f3d1c4fc1822b8d95d1dfcedfe5da0255bed1
Author: Jason Frey <fryguy9@gmail.com>
Date:   Fri Jun 23 15:12:40 2023 -0400

    Merge pull request #22577 from agrare/fix_embedded_ansible_scm_credential_parent_class
    
    Fix EmbeddedAnsible ScmCredential parent class
    
    (cherry picked from commit 60bc7dcd2647896b11f69a441e85dc269b3d5834)