replace deprecated 'set-env' with Environment Files in GitHub Actions

[prezha]

looking at github actions logs, there are (security vulnerability) warnings:

The set-env command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/

additional details:

Patching your actions and workflows

If you are using self-hosted runners make sure they are updated to version 2.273.1 or greater.

Action authors who are using the toolkit should update the @actions/core package to v1.2.6 or greater to get the updated addPath and exportVariable functions.

Action and workflow authors who are setting environment variables via stdout should update any usage of the set-env and add-path workflow commands to use the new environment files.

Starting today runner version 2.273.5 will begin to warn you if you use the add-path or set-env commands. We are monitoring telemetry for the usage of these commands and plan to fully disable them in the future.

in /home/prezha/dev/k8s/minikube/github.com/prezha/minikube/.github/workflows/ there are a couple of yaml files using that:

• iso.yml
• kic_image.yml
• master.yml
• pr.yml

according to the format and the GitHub Actions: Deprecating set-env and add-path commands as well as referenced Environment Files, something like:

find . -type f -name "*.yml" -print0 | xargs -0 sed -i -r 's/echo ::set-env name=(.*)::(.*)/echo "\1=\2" >> $GITHUB_ENV/g'

also (picked up in try no. 2 - special for functional_docker_windows and functional_hyperv_windows):

find . -type f -name "*.yml" -print0 | xargs -0 sed -i -r 's/echo "::set-env name=(.*)::(.*)"/echo "\1=\2" >> $GITHUB_ENV/g'

and finally, fixing the multline strings in STAT results (picked up in try no. 3)

should cover all the cases and resolve the issue, but i'm not sure about those functional_docker_windows and functional_hyperv_windows that still fail (maybe windows need special env var treatment?)

@afbjorklund i guess you are the right/best person to turn to, and if so: can you please have a look?

[prezha]

/assign