Add e2e case S00001

[bzsuni]

Fix #927

Testing the impact of adding and deleting Pods on EndpointSlices and Pod egress IP.

1. Create a gateway.
2. Create a policy.
3. Create and delete 10 Pods.
4. Verify the status of EndpointSlices and the egress IP of Pods.
5. When deleting all Pods, EndpointSlices should be deleted as well.

[codecov]

Codecov Report

Merging #982 (fefc530) into main (467deb2) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #982   +/-   ##
=======================================
  Coverage   44.44%   44.44%           
=======================================
  Files          21       21           
  Lines        3260     3260           
=======================================
  Hits         1449     1449           
  Misses       1605     1605           
  Partials      206      206           

Flag	Coverage Δ
unittests	44.44% <ø> (ø)

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