fix(Makefile): Remove duplicate operator-sdk goal, simplify code

[olivergondza]

What type of PR is this?

/kind cleanup

What does this PR do / why we need it:

The goal was duplicate with similar (but not same) logic - eliminated.

The implementation was silently picking operator-sdk when on PATH - must be provided through OPERATOR_SDK now. Element of least astonishment.

Conditional Makefile logic removed leveraging native make features.

Have you updated the necessary documentation?

• [n/a] Documentation update is required by this PR.
• [n/a] Documentation has been updated.

Which issue(s) this PR fixes:

None

Test acceptance criteria:

• [n/a] Unit Test
• [n/a] E2E Test

How to test changes / Special notes to the reviewer:

• make bundle
• rm -rf ./bin && make bundle
• make OPERATOR_SDK=/bin/operator-sdk bundle # When installed locally

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci[bot]]

Hi @olivergondza. Thanks for your PR.

I'm waiting for a redhat-developer member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[jgwest]

/ok-to-test

[olivergondza]

/retest

[olivergondza]

The tests are passing, this is ready for review.

[olivergondza]

Any comments, objections?

[openshift-ci[bot]]

@olivergondza: The following test 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/v4.14-e2e	7554ca66e617fcd4720b564397191d9e91cdb905	link	true	/test v4.14-e2e

Full PR test history. Your PR dashboard.

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 kubernetes-sigs/prow repository. I understand the commands that are listed here.