[YUNIKORN-1172] Clean up e2e test pods immediately

[craigcondit]

What is this PR for?

Speed up e2e tests and make them more resilient to pod cleanup timeouts by terminating pods immediately.

What type of PR is it?

• - Bug Fix
• - Improvement
• - Feature
• - Documentation
• - Hot Fix
• - Refactoring

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/YUNIKORN-1172

How should this be tested?

Screenshots (if appropriate)

Questions:

• - The licenses files need update.
• - There is breaking changes for older versions.
• - It needs documentation.

[wilfred-s]

LGTM +1

[codecov]

Codecov Report

Merging #406 (82a9a96) into master (be3bb70) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #406      +/-   ##
==========================================
- Coverage   65.47%   65.43%   -0.04%     
==========================================
  Files          40       40              
  Lines        6325     6325              
==========================================
- Hits         4141     4139       -2     
- Misses       2023     2025       +2     
  Partials      161      161              

Impacted Files	Coverage Δ
pkg/dispatcher/dispatcher.go	74.82% <0.00%> (-1.40%)	⬇️

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