fix: Add support for devfile attributes for schema version 2.0.0

[olexii4]

What does this PR do?

This PR added support for devfile attributes for schema version 2.0.0 and removed adding che.eclipse.org/devfile attribute from the target devworkspace.

What issues does this PR fix or reference?

It needs for eclipse-che/che#23301

Is it tested? How?

[svor]

@olexii4 the codebase looks good to me.
May I ask you to provide an example of devfile that I can use for testing and why it's only related to 2.0.0 version (it's just for my understanding)?

Also I asked @RomanNikitenko to confirm that these changes won't break che-code functionality

[RomanNikitenko]

@vitaliy-guliy
the PR changes potentially can affect Restart Workspace from Local Devfile command on the che-code side.
so, could you review these changes as well
thanks!

[vitaliy-guliy]

@vitaliy-guliy the PR changes potentially can affect Restart Workspace from Local Devfile command on the che-code side. so, could you review these changes as well thanks!

I would take some time to test the PR.

I think we need to rebuild both devworkspace-generator and che-code with the changes introduced by this PR.
Only giving that we can test che-code carefully.

[olexii4]

This PR need for eclipse-che/che-dashboard#1315

[vitaliy-guliy]

I tried to test changes in this PR, but build is failed because of previous changes #64.
I think we have to adapt to that changes and then proceed with this pull request

[ibuziuk]

@mkuznyetsov just to be on the safe side this runner is NOT deprecated?

[svor]

lgtm
let's wait for @vitaliy-guliy's review

[vitaliy-guliy]

I've built che-code applying changes from this pull request and have checked how does restart workspace from local devfile work.

At the moment I do not see any regressions.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: olexii4, svor, vitaliy-guliy

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[vitaliy-guliy]

che-code UBI8-adm64 image quay.io/vgulyy/che-code:test-devworkspace-generator