chore: simplify e2e env

[bzp2010]

Please answer these questions before submitting a pull request, or your PR will get closed.

Why submit this pull request?

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

What changes will this PR take into?

Simplify the E2E testing environment and reduce the mental burden.

• Upgrade Ginkgo to v2
• Remove meaningless cases
• Improve backend E2E passrate
• Add auto retries to backend E2E
• Fix some wrong things in cases

Checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[codecov-commenter]

Codecov Report

Merging #2694 (fe3b6a1) into master (c1cf4d4) will decrease coverage by 9.37%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2694      +/-   ##
==========================================
- Coverage   76.34%   66.96%   -9.38%     
==========================================
  Files         139      198      +59     
  Lines        3754     7750    +3996     
  Branches      874      870       -4     
==========================================
+ Hits         2866     5190    +2324     
- Misses        888     2258    +1370     
- Partials        0      302     +302     

Flag	Coverage Δ
backend-e2e-test-ginkgo	65.11% <ø> (?)
backend-unit-test	50.08% <ø> (?)
frontend-e2e-test	61.26% <ø> (-15.09%)	⬇️

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

Impacted Files	Coverage Δ
...nents/PluginFlow/components/FlowGraph/FlowGraph.ts	1.36% <0.00%> (-82.20%)	⬇️
web/src/components/LabelsfDrawer/LabelsDrawer.tsx	3.92% <0.00%> (-80.40%)	⬇️
web/src/components/PluginFlow/PluginFlow.tsx	1.42% <0.00%> (-80.00%)	⬇️
...b/src/pages/Route/components/DataLoader/Import.tsx	4.91% <0.00%> (-78.69%)	⬇️
...es/Route/components/DataLoader/loader/OpenAPI3.tsx	33.33% <0.00%> (-66.67%)	⬇️
web/src/components/PluginFlow/constants.ts	29.03% <0.00%> (-58.07%)	⬇️
...pages/Route/components/Step1/MatchingRulesView.tsx	25.00% <0.00%> (-54.17%)	⬇️
...components/PluginFlow/components/Toolbar/index.tsx	2.40% <0.00%> (-27.72%)	⬇️
web/src/pages/Route/transform.ts	53.15% <0.00%> (-27.37%)	⬇️
.../src/pages/Route/components/Step1/ProxyRewrite.tsx	70.68% <0.00%> (-24.14%)	⬇️
... and 81 more

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