feat: support custom registry for e2e test

[Belyenochi]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What this PR does / why we need it:

resolves #880

[tao12345666333]

Thanks! it's on my list.

I will review it ASAP.

[codecov-commenter]

Codecov Report

Merging #896 (7173ed6) into master (e2475cf) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #896   +/-   ##
=======================================
  Coverage   32.01%   32.02%           
=======================================
  Files          70       71    +1     
  Lines        7749     7772   +23     
=======================================
+ Hits         2481     2489    +8     
- Misses       4993     5009   +16     
+ Partials      275      274    -1     

Impacted Files	Coverage Δ
pkg/apisix/cluster.go	31.88% <0.00%> (-0.70%)	⬇️
pkg/ingress/endpoint.go	0.00% <0.00%> (ø)
pkg/ingress/apisix_route.go	0.00% <0.00%> (ø)
pkg/apisix/noop.go	0.00% <0.00%> (ø)
pkg/apisix/stream_route.go	36.42% <0.00%> (+0.12%)	⬆️
pkg/kube/translation/apisix_route.go	22.43% <0.00%> (+0.60%)	⬆️
pkg/ingress/pod.go	37.34% <0.00%> (+2.34%)	⬆️

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[lingsamuel]

LGTM
We don't need to change CI config since it starts kind directly https://github.com/apache/apisix-ingress-controller/blob/master/.github/workflows/e2e-test-ci.yml#L89

[lingsamuel]

Thanks!