632-devfile annotation support in generators

[yangcao77]

What does this PR do?:

This PR is for devfile annotation support.

Which issue(s) this PR fixes:

Fixes devfile/api#632
Fixes devfile/api#675

PR acceptance criteria:

Testing and documentation do not need to be complete in order for this PR to be approved. We just need to ensure tracking issues are opened.

• Open new test/doc issues under the devfile/api repo
• Check each criteria if:
• There is a separate tracking issue. Add the issue link under the criteria
  or
• test/doc updates are made as part of this PR
• If unchecked, explain why it's not needed

• Unit/Functional tests

• QE Integration test

• Documentation

• Client Impact

How to test changes / Special notes to the reviewer:

[kim-tsao]

We should include some coverage for parent/plugin Annotation overrides in the parse_test.go

[yangcao77]

We should include some coverage for parent/plugin Annotation overrides in the parse_test.go

@kim-tsao I've pushed a new commit to add annotation field in plugin & parent override tests.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kim-tsao, yangcao77

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[yangcao77]

@kadel Can you also help review if this PR addresses Odo's request.

[feloy]

@kadel Can you also help review if this PR addresses Odo's request.

@yangcao77 Testing with odo, I can see that the annotation field is added to v2.0.0 and v2.1.0 devfiles also, for example:

components:
- container:
    annotation: {}
    endpoints:
    - name: http-3000
      targetPort: 3000
    image: registry.access.redhat.com/ubi8/nodejs-14:latest
    memoryLimit: 1024Mi
    mountSources: true
    sourceMapping: /project
  name: runtime
[...]
schemaVersion: 2.0.0

[yangcao77]

@kadel Can you also help review if this PR addresses Odo's request.

@yangcao77 Testing with odo, I can see that the annotation field is added to v2.0.0 and v2.1.0 devfiles also, for example:

components:
- container:
    annotation: {}
    endpoints:
    - name: http-3000
      targetPort: 3000
    image: registry.access.redhat.com/ubi8/nodejs-14:latest
    memoryLimit: 1024Mi
    mountSources: true
    sourceMapping: /project
  name: runtime
[...]
schemaVersion: 2.0.0

@feloy How did you get this content? you are using devfile writer? This should be a bug, and I will need to submit another PR in api to fix that. (devfile/api#682) Thanks for pointing out.

annotations are not added to devfile v2.0.0 or v2.1.0, and we are not planning to do that.
https://github.com/devfile/api/blob/2.0.x/schemas/latest/devfile.json
https://github.com/devfile/api/blob/2.1.x/schemas/latest/devfile.json

[openshift-ci]

New changes are detected. LGTM label has been removed.

[yangcao77]

@feloy The annotation problem with writer should be fixed by the new commit in this PR, can you help test again? Thanks.

[feloy]

@feloy The annotation problem with writer should be fixed by the new commit in this PR, can you help test again? Thanks.

@yangcao77 yes, the problem is fixed with this commit, thanks