k/e: Streamline Issue Template

[kikisdeliveryservice]

The current issue template contains fields that are not longer strictly necessary due to the release team's usage of the project boards and has information that tends to go stale. The staleness generally happens when the original author no longer works on the issue and the new author is unable to edit it. This causes friction and stale data in the description.

Potential fields targeted for removal as they tend to change/go stale during an enhancement's lifetime:

• Primary contact (assignee):
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y):
  • Beta release target (x.y):
  • Stable release target (x.y):
• Alpha
  • KEP (k/enhancements) update PR(s):
  • Code (k/k) update PR(s):
  • Docs (k/website) update PR(s):
• Beta
  • KEP (k/enhancements) update PR(s):
  • Code (k/k) update PR(s):
  • Docs (k/website) update(s):
• Stable
  • KEP (k/enhancements) update PR(s):
  • Code (k/k) update PR(s):
  • Docs (k/website) update(s):

Goals:

• review and streamline the current issue fields
• make it easier for a new contributor to take over an existing issue fully
• ensure that changes cause no regressions to the Release Team's work

Target: 1.34