test: enhanced test stability

[guoqqqi]

Please answer these questions before submitting a pull request

• Why submit this pull request?

• Bugfix

• New feature provided

• Improve performance

• Backport patches

• Related issues
  related fix: fix the uptime translation error #1605 feat: add the service page upstream select option #1633 fix: improve Route module #1634

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fixed CI error:
Update front-end E2E tests to enhance stability based on CI errors.

[codecov-io]

Codecov Report

Merging #1645 (13970e8) into master (85efb37) will decrease coverage by 4.93%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1645      +/-   ##
==========================================
- Coverage   72.38%   67.45%   -4.94%     
==========================================
  Files         134       47      -87     
  Lines        5737     3116    -2621     
  Branches      665        0     -665     
==========================================
- Hits         4153     2102    -2051     
+ Misses       1341      767     -574     
- Partials      243      247       +4     

Flag	Coverage Δ
backend-e2e-test	?
backend-e2e-test-ginkgo	48.04% <ø> (+0.32%)	⬆️
backend-unit-test	51.81% <ø> (ø)
frontend-e2e-test	?

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

Impacted Files	Coverage Δ
api/internal/handler/data_loader/route_import.go	35.08% <0.00%> (-29.84%)	⬇️
api/internal/core/entity/entity.go	75.00% <0.00%> (-25.00%)	⬇️
api/internal/handler/global_rule/global_rule.go	66.12% <0.00%> (-17.75%)	⬇️
api/internal/utils/utils.go	54.11% <0.00%> (-11.77%)	⬇️
api/internal/route.go	76.47% <0.00%> (-8.83%)	⬇️
api/internal/core/store/storehub.go	67.28% <0.00%> (-3.74%)	⬇️
api/internal/filter/schema.go	52.10% <0.00%> (-3.37%)	⬇️
api/internal/core/store/validate.go	67.03% <0.00%> (-2.24%)	⬇️
api/internal/handler/label/label.go	80.18% <0.00%> (-1.89%)	⬇️
api/internal/core/store/store.go	87.95% <0.00%> (-1.21%)	⬇️
... and 88 more

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[liuxiran]

LGTM