refactor(buildrun): implement Template Method pattern for TaskRun and PipelineRun generation

[ayushsatyam146]

Changes

Submitter Checklist

• [ ] Includes tests if functionality changed/was added
• [ ] Includes docs if changes are user-facing
• [ ] Set a kind label on this PR
• [ ] Release notes block has been filled in, or marked NONE

See the contributor guide for details on coding conventions, github and prow interactions, and the code review process.

Release Notes

NONE

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Once this PR has been reviewed and has the lgtm label, please assign apoorvajagtap for approval. For more information see the Code Review Process.

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