Use :provider_embedded_ansible factory

[NickLaMuro]

This will be changed in ManageIQ/manageiq#20816 and make the solo manager unable to be created as a factory.

[miq-bot]

Checked commit https://github.com/NickLaMuro/manageiq-automation_engine/commit/b9fcf61d1f8a59ebcf7fd1bfdd0c8fdd004f4f5b with ruby 2.6.3, rubocop 0.82.0, haml-lint 0.35.0, and yamllint 2 files checked, 0 offenses detected Everything looks fine. :cookie:

[coveralls]

Pull Request Test Coverage Report for Build 4679

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.729%

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Totals
Change from base Build 4671:	0.0%
Covered Lines:	5046
Relevant Lines:	5886

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💛 - Coveralls