Replace old angular ansible tower form with a react based DDF

[skateman]

As this provider screen is explorer-based, it has some issues with redirects after creating/editing. The redirect after an API call requires a permalink to a given provider, which is not doable here. Therefore, as long as this screen is not de-explorerized, any operation will redirect back to the providers list screen.

Parent issue: ManageIQ/manageiq#18818
Depends on: ManageIQ/manageiq-providers-ansible_tower#228 ManageIQ/manageiq-providers-ansible_tower#229

[miq-bot]

Checked commit skateman@5312c9d with ruby 2.5.7, rubocop 0.69.0, haml-lint 0.28.0, and yamllint
2 files checked, 1 offense detected

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• 💣 💥 🔥 🚒 - Linter/Haml - Linter::Haml STDERR:

warning: parser/current is loading parser/ruby25, which recognizes
warning: 2.5.8-compliant syntax, but you are running 2.5.7.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.

[skateman]

@h-kataria this is ready for review

[h-kataria]

verified in UI.
@skateman Noticed 2 differences from old version of the form in flash messages.

• Flash message is missing when pressing Reset button on edit Provider form, need to open a separate issue to make it consistent among all DDF forms.
• When pressing Cancel button on edit form, record name/display name is missing from the flash message

[skateman]

@h-kataria are these issues happening only on the infra provider forms, or other ones too? If yes, please create separate issues as the problem is global and not in the context of this PR.

[h-kataria]

@h-kataria are these issues happening only on the infra provider forms, or other ones too? If yes, please create separate issues as the problem is global and not in the context of this PR.

opened #7244