Change license to Apache 2.0

[l0rd]

What does this PR do?

We are about to propose Devfile as a CNCF sandbox project. Most of the CNCF projects are licensed under Apache-2.0 and that’s what the community is used to. Re-licensing to Apache-2.0 would make the process smoother and augment our chances to successfully transition the project to CNCF sandbox. Both EPL-2.0 and Apache-2.0 are open source licenses that are widely used in the industry and Apache-2.0 is considered more permissive than EPL-2.0.

⚠️ This PR is in draft mode. We are contacting existing contributors to get their approval and then we will merge it.

What issues does this PR fix or reference?

devfile/api#426

[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

[elsony]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: elsony, l0rd

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[l0rd]

We had the approval from all the contributors to re-license the project.

[l0rd]

We had the approval from all the contributors to re-license the project.

[openshift-ci]

@l0rd: 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/v4.5-registry-operator-integration-test	9aeb85b	link	true	/test v4.5-registry-operator-integration-test

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/test-infra repository. I understand the commands that are listed here.