Remove workaround to add os.version to the manifest for Windows images

[mauriciopoppe]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

What this PR does / why we need it:

It looks like a recent version of docker in CI is adding os.version so the workaround to add it on our own is no longer needed, this was causing a double os.version to be added to the manifest as seen here:

I0512 18:36:46.423] {"Ref":"gcr.io/gce-cvm-upg-lat-1-3-ctl-skew/gcp-persistent-disk-csi-driver:d5486a25-280b-4d7e-a899-98a3f37b0818_ltsc2019","Descriptor":{"mediaType":"application/vnd.docker.distribution.manifest.v2+json","digest":"sha256:cb0b111aba51dfdfcf8fcdec778c20c3bf153c9180bcbaf597c7a5f58c886794","size":956,"platform":{"architecture":"amd64","os":"windows","os.version":"10.0.17763.2928",,"os.version":"10.0.17763.2928"}}, ...}

I'm commenting the part that performs the text replacement, if this works then eventually this file and its usages should be removed.

Which issue(s) this PR fixes:

Ref #982

Does this PR introduce a user-facing change?:

NONE

/assign @saikat-royc

[mauriciopoppe]

/cc @saikat-royc

[mauriciopoppe]

/retest
/cc @mattcary

[mauriciopoppe]

/retest

[mauriciopoppe]

/retest

[mattcary]

/lgtm

[mauriciopoppe]

@mattcary could you please approve this PR too?

[mattcary]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mattcary, mauriciopoppe

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[mauriciopoppe]

/retest