🌱 fix: e2e test: validate inputData during log postprocessing to avoid panic

[damdo]

What type of PR is this?

/kind failing-test

What this PR does / why we need it:

validate inputData during log postprocessing to avoid panic.
Occurrence https://prow.k8s.io/view/gs/kubernetes-ci-logs/logs/periodic-cluster-api-provider-aws-e2e/1995405094014685184#1:build-log.txt%3A1594

[PANICKED] in [It] - /usr/local/go/src/runtime/panic.go:792 @ 12/01/25 08:47:22.599
  << Timeline
push_pin
  [PANICKED] Test Panicked
  In [It] at: /usr/local/go/src/runtime/panic.go:792 @ 12/01/25 08:47:22.599
  runtime error: index out of range [1] with length 1
  Full Stack Trace
    panic({0x48b5c60?, 0xc0019e2000?})
    	/usr/local/go/src/runtime/panic.go:792 +0x132
    sigs.k8s.io/cluster-api-provider-aws/v2/test/e2e/shared.postProcessBase64LogData({0xc003156580, 0x6a}, {0x4d195ef?, 0xc000ab8558?}, {0x4d2319d, 0xf})
    	/home/prow/go/src/sigs.k8s.io/cluster-api-provider-aws/test/e2e/shared/common.go:315 +0x3b7
    sigs.k8s.io/cluster-api-provider-aws/v2/test/e2e/shared.DumpMachine({_, _}, _, {{{0xc001fcee90, 0xa}, {0xc00293a840, 0x27}}, {{0xc002b167e0, 0x1f}, {0x0, ...}, ...}, ...}, ...)
    	/home/prow/go/src/sigs.k8s.io/cluster-api-provider-aws/test/e2e/shared/common.go:218 +0x5ac
    sigs.k8s.io/cluster-api-provider-aws/v2/test/e2e/shared.DumpMachines({0x5416508, 0xc0013a2370}, 0xc0004a72c0, 0x0?)
    	/home/prow/go/src/sigs.k8s.io/cluster-api-provider-aws/test/e2e/shared/common.go:127 +0x119
    sigs.k8s.io/cluster-api-provider-aws/v2/test/e2e/shared.AllNodesBeforeSuite.func2()
    	/home/prow/go/src/sigs.k8s.io/cluster-api-provider-aws/test/e2e/shared/suite.go:276 +0x127
    created by sigs.k8s.io/cluster-api-provider-aws/v2/test/e2e/shared.AllNodesBeforeSuite in goroutine 103
    	/home/prow/go/src/sigs.k8s.io/cluster-api-provider-aws/test/e2e/shared/suite.go:267 +0x70c

Release note:

NONE

[damdo]

/assign @chrischdi

[chrischdi]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Details

Git tree hash: f07531e0ec6ba89265a0816dae30f066130ff6cc

[damdo]

/assign @kubernetes-sigs/cluster-api-provider-aws-maintainers

[damdo]

/assign @nrb @richardcase @AndiDog @dlipovetsky

[nrb]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nrb

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[damdo]

/test pull-cluster-api-provider-aws-test

[k8s-ci-robot]

@damdo: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-aws-test	7f4c07d	link	true	/test pull-cluster-api-provider-aws-test

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[damdo]

/test pull-cluster-api-provider-aws-test