move envtest helpers into framework package for easier reuse

[cheesesashimi]

- What I did

I moved the EnvTest setup and environment cleanup code into the test/framework package for easier reuse across the rest of the MCO codebase. Additionally, I refactored the Makefile as well as some of the test scripts to collect JUnit test reports in CI as well as a test coverage report.

- How to verify it

Because test/e2e-bootstrap is the only test suite that uses EnvTest, one can run $ make bootstrap-e2e or run the test target via /test bootstrap-unit. (For some unknown reason, we're not running bootstrap-unit on each PR, though it makes sense to because they're not overly resource intensive and execute quickly.)

For the JUnit and test coverage reports, open the links for the various Prow CI jobs and you should see them enumerated in the Test Results pane as well as a red / green graphic illustrating test coverage.

- Description for the changelog
Move EnvTest helpers into framework package for easier reuse

[cheesesashimi]

Converting to draft to conserve CI resources while I debug the bootstrap-unit stage.

[cheesesashimi]

This is now ready for review!

[cheesesashimi]

/test bootstrap-unit

[yuqi-zhang]

Generally lgtm! Tested locally as well just to make sure and all the tests seem to run as expected.

Will let others give a look as well before lgtm

[openshift-ci]

@cheesesashimi: 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/e2e-alibabacloud	d37c3e9	link	false	/test e2e-alibabacloud
ci/prow/e2e-hypershift	d37c3e9	link	false	/test e2e-hypershift

Full PR test history. Your PR dashboard.

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[yuqi-zhang]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cheesesashimi, yuqi-zhang

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• OWNERS [cheesesashimi,yuqi-zhang]

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[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD 5b8bd66 and 2 for PR HEAD d37c3e9 in total