OSASINFRA-4375: Drop Legacy openshift-test entry point: release-4.20

[danchild]

Following the migration of openstack-test to the
OTE framework, the entry point is no longer needed.

Changes:

• Remove openstack-test binary and related libs
  in pkg
• Remove openshift-tests builder and entry point in
  the Containerfile
• Remove stale openshift-tests references for make tooling
• Update README.md with new instructions on how to manually
  invoke the new OTE binary
• update module and vendored dependencies

Dependencies:
openshift/release/pull/82506
openshift/release/pull/82674

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

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[openshift-ci]

@danchild: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/build	c1725d5	link	true	/test build
ci/prow/test	c1725d5	link	true	/test test
ci/prow/images	c1725d5	link	true	/test images

Full PR test history. Your PR dashboard.

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[openshift-ci-robot]

@danchild: This pull request references OSASINFRA-4375 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.20.z" version, but no target version was set.

Details

In response to this:

Following the migration of openstack-test to the
OTE framework, the entry point is no longer needed.

Changes:

• Remove openstack-test binary and related libs
  in pkg
• Remove openshift-tests builder and entry point in
  the Containerfile
• Remove stale openshift-tests references for make tooling
• Update README.md with new instructions on how to manually
  invoke the new OTE binary
• update module and vendored dependencies

NOTE: depends on openshift/release#82506; 4.20 release jobs need to drop callers of the legacy openstack-tests binary before this can be merged.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.