[Improvement-1457] Use kind cmd code to load docker image instead of local kind binary

[chengshiwen]

Just use

err := kind.LoadDockerImage(image)

instead of

cmd := exec.Command("kind", "load", "docker-image", image)

Refer to https://github.com/kubernetes-sigs/kind/blob/main/pkg/cmd/kind/load/docker-image/docker-image.go

This closes #413 and closes #1457

The docker command will be resolved after kind

[codecov]

Codecov Report

Merging #1458 (d991b28) into master (9bf6cc2) will decrease coverage by 0.41%.
The diff coverage is 27.69%.

@@            Coverage Diff             @@
##           master    #1458      +/-   ##
==========================================
- Coverage   53.62%   53.21%   -0.42%     
==========================================
  Files          81       83       +2     
  Lines        8080     8180     +100     
==========================================
+ Hits         4333     4353      +20     
- Misses       3223     3307      +84     
+ Partials      524      520       -4     

Flag	Coverage Δ
unittests	53.21% <27.69%> (-0.42%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/builtin/build/build.go	14.47% <0.00%> (+2.11%)	⬆️
pkg/builtin/kind/client.go	28.57% <28.57%> (ø)
pkg/appfile/parser.go	57.69% <0.00%> (-11.00%)	⬇️
pkg/oam/util/test_utils.go	52.45% <0.00%> (-9.84%)	⬇️
...n/rollout/workloads/cloneset_rollout_controller.go	63.22% <0.00%> (-2.11%)	⬇️
pkg/dsl/definition/template.go	27.57% <0.00%> (-1.60%)	⬇️
pkg/dsl/model/instance.go	70.27% <0.00%> (-1.53%)	⬇️
pkg/webhook/common/rollout/rollout_plan.go	36.84% <0.00%> (-1.34%)	⬇️
pkg/controller/utils/capability.go	44.55% <0.00%> (-0.55%)	⬇️
pkg/dsl/definition/package.go	85.26% <0.00%> (-0.46%)	⬇️
... and 11 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9bf6cc2...d991b28. Read the comment docs.

[wonderflow]

great job!