Update release process

[cdivitotawela]

PR description

Previously GitHub release will be created which triggers building and publishing the artifacts. Release engineers found workflow could fail after the GitHub release created. Community may subscribed to GitHub releases but if the workflow failed, artifacts for the release would not available.

Proposed solution requires release engineer to run a GitHub workflow manually by providing the Git tag which creates a draft GitHub release. During this workflow, release artifacts binary distribution, docker images (not latest), Artifactory jars created and published. Release engineer can update the release notes in draft release and publish the release. At the time when the release is published, release engineer is confident all the artifacts are ready. Upon publishing the release, another workflow is triggered to promote the release version of docker images to latest

Creating Draft Release

Publish Draft Release

Thanks for sending a pull request! Have you done the following?

• Checked out our contribution guidelines?
• Considered documentation and added the doc-change-required label to this PR if updates are required.
• Considered the changelog and included an update if required.
• For database changes (e.g. KeyValueSegmentIdentifier) considered compatibility and performed forwards and backwards compatibility tests

Locally, you can run these tests to catch failures early:

• unit tests: ./gradlew build
• acceptance tests: ./gradlew acceptanceTest
• integration tests: ./gradlew integrationTest
• reference tests: ./gradlew ethereum:referenceTests:referenceTests

[jflo]

Good improvements in here