USHIFT-793: add a script to automatically produce EC release notes

[dhellmann]

This script partially automates the process of publishing release
notes for engineering candidates.

[openshift-ci-robot]

@dhellmann: This pull request references USHIFT-739 which is a valid jira issue.

In response to this:

This script partially automates the process of publishing release
notes for engineering candidates.

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.

[dhellmann]

/assign @pmtk @ggiguash @pacevedom

[dhellmann]

https://github.com/openshift/microshift/releases/tag/4.13.0-ec-3 was created using this script.

[openshift-ci-robot]

@dhellmann: This pull request references USHIFT-793 which is a valid jira issue.

In response to this:

This script partially automates the process of publishing release
notes for engineering candidates.

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.

[dhellmann]

Transposed the digits in the ticket ID at first. This is related to USHIFT-793.

[pmtk]

Looks very nice, I like the result (release tag on GH).
Hold in case you want others to look at this, otherwise unhold.

/lgtm
/hold

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dhellmann, pmtk

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[dhellmann]

I expect to keep iterating on this, so I think it's safe to merge this early version.

/hold cancel

[openshift-ci]

@dhellmann: all tests passed!

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