[4.3.x] fix: map endpoint headers to map on v2 crd export

[mergify]

This is an automatic copy of pull request #10564 done by Mergify.

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see https://gravitee.atlassian.net/browse/GKO-944

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📚  View the storybook of this branch here

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Cherry-pick of e09d445 has failed:

On branch mergify/bp/4.3.x/pr-10564
Your branch is up to date with 'origin/4.3.x'.

You are currently cherry-picking commit e09d4452a9.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   gravitee-apim-definition/gravitee-apim-definition-model/src/test/resources/io/gravitee/definition/model/kubernetes/v1alpha1/api-definition.json

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   gravitee-apim-definition/gravitee-apim-definition-model/src/main/java/io/gravitee/definition/model/kubernetes/v1alpha1/ApiDefinitionResource.java
	both modified:   gravitee-apim-definition/gravitee-apim-definition-model/src/test/java/io/gravitee/definition/model/kubernetes/v1alpha1/ApiDefinitionResourceTest.java
	both modified:   gravitee-apim-rest-api/gravitee-apim-rest-api-service/src/main/java/io/gravitee/rest/api/service/impl/ApiExportServiceImpl.java

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

Cherry-pick of e09d445 has failed:

On branch mergify/bp/4.3.x/pr-10564
Your branch is up to date with 'origin/4.3.x'.

You are currently cherry-picking commit e09d4452a9.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   gravitee-apim-definition/gravitee-apim-definition-model/src/test/resources/io/gravitee/definition/model/kubernetes/v1alpha1/api-definition.json

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   gravitee-apim-definition/gravitee-apim-definition-model/src/main/java/io/gravitee/definition/model/kubernetes/v1alpha1/ApiDefinitionResource.java
	both modified:   gravitee-apim-definition/gravitee-apim-definition-model/src/test/java/io/gravitee/definition/model/kubernetes/v1alpha1/ApiDefinitionResourceTest.java
	both modified:   gravitee-apim-rest-api/gravitee-apim-rest-api-service/src/main/java/io/gravitee/rest/api/service/impl/ApiExportServiceImpl.java

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally