Makefile: Support http & insecure registry in opm

[Akrog]

In a previous patch we added the USE_TLS environmental variable to our Makefile to allow pushing to insecure local registries during development.

This patch extends this functionality to support the catalog building as well, which is convenient when using the registry container image for local development.

With podman/docker push using the VERIFY_TLS=false will not only disable the TLS verification but will also allow HTTP connections, which is not the case of the opm command.

The opm command has 2 different options --skip-tls-verify and --use-http, so we'll use the existing VERIFY_TLS for the first and a new USE_HTTP for the second.

[openshift-ci]

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This pull-request has been approved by: Akrog
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[abays]

+1 from me

[openshift-ci]

@Akrog: 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/cinder-operator-build-deploy-kuttl	6e3b9e7	link	true	/test cinder-operator-build-deploy-kuttl

Full PR test history. Your PR dashboard.

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