Capture NSSM log output files in e2e for windows

[jsturtevant]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
With the fix that went into Image builder to use nssm for log rotation on Windows, the log naming is slightly different. This updates to use either format.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

NONE

[jsturtevant]

/test pull-cluster-api-provider-azure-windows-containerd-upstream-with-ci-artifacts

[jsturtevant]

kubelet log was picked up properly: https://storage.googleapis.com/kubernetes-jenkins/pr-logs/pull/kubernetes-sigs_cluster-api-provider-azure/2010/pull-cluster-api-provider-azure-windows-containerd-upstream-with-ci-artifacts/1486465921999441920/artifacts/clusters/capz-conf-uod1ld/machines/capz-conf-uod1ld-md-win-766dc4d896-ngd67/kubelet.log

/assign @marosset @CecileRobertMichon

[CecileRobertMichon]

/lgtm

[CecileRobertMichon]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CecileRobertMichon

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