chore(source): remove cloudfoundry support

[ivankatliarchuk]

What does it do ?

Remove cloudfoundry support

It was added in 2018 #955

No documentation, no updates since 2018. I was using Cloudfoundry years back. Not sure what exactly this code should support. Basically cloudfoundry does not require external-dns, and is a different platform.

Most recent cloudfoundry is very much integrated with Kubernetes https://www.cloudfoundry.org/technology/korifi/, and it does support ingress, service and etc, so does not require anything specific.

Motivation

More

• Yes, this PR title follows Conventional Commits
• Yes, I added unit tests
• Yes, I updated end user documentation accordingly

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[coveralls]

Pull Request Test Coverage Report for Build 20639496252

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 71 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.002%) to 78.801%

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Files with Coverage Reduction	New Missed Lines	%
openshift_route.go	1	84.29%
store.go	70	40.78%

Totals
Change from base Build 20636734136:	0.002%
Covered Lines:	15776
Relevant Lines:	20020

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💛 - Coveralls