Update Prow configuration for Feast CI

[davidheryanto]

Update Prow configuration to execute Prow jobs for running unit tests and integration tests.

The configuration for the Prow job is in .prow/scripts/config.yaml file.

config-updater plugin has been set up, so changes to .prow/scripts/config.yaml in a pull request will automatically update Prow configuration once it is merged.

There are now 5 required status checks that must pass before pull request can be automatically merged:

• unit-test-core
• unit-test-ingestion
• unit-test-serving
• unit-test-cli
• integration-test

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: davidheryanto

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

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [davidheryanto]

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

[budi]

so approving a commit workflow:

• if contributors are outside of org, admin must check the code before doing /ok-to-test
• after the tests finished, check if all the jobs are succeeded, and then /lgtm and /approve by the maintainers
• if all is good, the tide plugin will do the automerge

[pradithya]

/lgtm Thanks so much @davidheryanto

[zhilingc]

/lgtm