test images: Adds sync.exe to Windows agnhost images

[claudiubelu]

What type of PR is this?

/kind feature

/sig windows
/sig testing

/priority important-soon

What this PR does / why we need it:

We can get sync.exe from coreutils.

Which issue(s) this PR fixes:

Fixes #101172

Special notes for your reviewer:

Built claudiubelu/agnhost:2.33 with this PR:

docker run --rm --entrypoint sync.exe claudiubelu/agnhost:2.33 --help
Unable to find image 'claudiubelu/agnhost:2.33' locally
2.33: Pulling from claudiubelu/agnhost
ba17af31b927: Pull complete
...
7f46c3c5afe7: Pull complete
Digest: sha256:0e5869ae59ad8609b96d1e750205be6cb190fc59ee4ee648635f27d8dbd808fd
Status: Downloaded newer image for claudiubelu/agnhost:2.33
Usage: sync.exe [OPTION] [FILE]...
Synchronize cached writes to persistent storage

If one or more files are specified, sync only them,
or their containing file systems.

  -d, --data             sync only file data, no unneeded metadata
  -f, --file-system      sync the file systems that contain the files
      --help     display this help and exit
      --version  output version information and exit

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Full documentation <https://www.gnu.org/software/coreutils/sync>
or available locally via: info '(coreutils) sync invocation'

This is an UNSUPPORTED, UNTESTED, EXPERIMENTAL build of GNU coreutils.
USE AT YOUR OWN RISK.

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

@claudiubelu: This issue is currently awaiting triage.

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[mauriciopoppe]

Below these lines it says "agnhost: dependents" and it still has v2.32, do we need to update that too?

[claudiubelu]

We update that later. First, we need to merge this PR, so the postsubmit jobs will build agnhost:2.33, then we promote the image from staging, then we send a PR that updates test/utils/image/manifest.go.

[mauriciopoppe]

Got it, thanks

[mauriciopoppe]

it'd also be great if the README inside test/images/agnhost is updated

[claudiubelu]

it'd also be great if the README inside test/images/agnhost is updated

Done

[mauriciopoppe]

Although I'm not an approver in build/OWNERS

/lgtm

[claudiubelu]

Needs milestone.

/cc @mkumatag

[mkumatag]

/lgtm
/approve

[spiffxp]

/approve
/lgtm
/milestone v1.23

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: claudiubelu, mkumatag, spiffxp

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• test/images/agnhost/OWNERS [claudiubelu,mkumatag,spiffxp]

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