Add export PLATFORMS=all to post-submit jobs for kubemacpool.

[ashokpariya0]

This update ensures that the PLATFORMS environment variable is set to "all" before executing the make container docker-push . This change enables building multi-platform images for kubemacpool cni.

What this PR does / why we need it:
Currently, we are only posting an amd64-supported image for the Kubemacpool CNI: link to image.

To build a multi-platform image that supports amd64, arm64, and s390x, the PLATFORMS=all environment variable must be exported before running the make container command.

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 #

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Hi @ashokpariya0. Thanks for your PR.

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[oshoval]

Thanks
This PR should be merged before the other KMP PR, right ?
No biggie, but i think it is better

[ashokpariya0]

Thanks This PR should be merged before the other KMP PR, right ? No biggie, but i think it is better

We can go ahead and merge this PR.

[oshoval]

up to Ram
Thanks

[oshoval]

afterwards i believe you would like a release

[ashokpariya0]

afterwards i believe you would like a release

Yes, and we can use the released tagged images in CNAO.