fix: use require instead of t.Fatal(err) in tests/e2e package

[mmorel-35]

This uses testify instead of testing for t.Fatal calls

[k8s-ci-robot]

Hi @mmorel-35. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[mmorel-35]

/assign @spzala

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.78%. Comparing base (e476f72) to head (f55885b).
Report is 2 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
server/etcdserver/server.go	81.97% <ø> (+0.22%)	⬆️

... and 19 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #18821      +/-   ##
==========================================
+ Coverage   68.77%   68.78%   +0.01%     
==========================================
  Files         420      420              
  Lines       35598    35598              
==========================================
+ Hits        24482    24487       +5     
- Misses       9684     9688       +4     
+ Partials     1432     1423       -9     

---

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[mmorel-35]

/assign @ahrtr

[ahrtr]

/ok-to-test

[ahrtr]

This PR is just mechanical changes, but we love small PRs. I will let this PR in, but please try to submit small PR , i.e. < 100 lines of code change as much as you can next time. Thanks.

[ivanvc]

Question: do all of these changes come from this specific linter? There are some formatting changes that look unrelated, but I may be wrong.

[fuweid]

Basically, it looks good.

The pull requests include refactors, for example,

• var => :=
• Two lines => one line
• Adding empty line

For reviewer, if non-related change is small, it's easy to be accepted and review
However, there are too many lines changed not related to that using requires.
My suggestion is that if linter doesn't blame, just keep it as it is and file other pull request for that.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: fuweid, mmorel-35
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[mmorel-35]

The formatting shouldn't be part of this PR. I hold on this to apply gofumpt first

[mmorel-35]

/retest

[mmorel-35]

/retest