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.

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[mmorel-35]

/assign @spzala

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 25.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 68.74%. Comparing base (1ee6598) to head (e82dfcc).
Report is 4 commits behind head on main.

❗ Current head e82dfcc differs from pull request most recent head 4e5c16d

Please upload reports for the commit 4e5c16d to get more accurate results.

Files with missing lines	Patch %	Lines
etcdctl/ctlv3/command/printer.go	0.00%	3 Missing ⚠️
etcdctl/ctlv3/command/check.go	0.00%	2 Missing ⚠️
etcdutl/etcdutl/snapshot_command.go	0.00%	1 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

Files with missing lines	Coverage Δ
etcdctl/ctlv3/command/elect_command.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/ep_command.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/lease_command.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/printer_fields.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/printer_simple.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/printer_table.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/snapshot_command.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/user_command.go	0.00% <ø> (ø)
etcdctl/ctlv3/ctl.go	0.00% <ø> (ø)
etcdutl/ctl.go	0.00% <ø> (ø)
... and 8 more

... and 19 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #18821      +/-   ##
==========================================
+ Coverage   68.70%   68.74%   +0.04%     
==========================================
  Files         420      420              
  Lines       35531    35532       +1     
==========================================
+ Hits        24413    24428      +15     
+ Misses       9687     9681       -6     
+ Partials     1431     1423       -8     

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[mmorel-35]

/assign @ahrtr

[ahrtr]

/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mmorel-35
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