[release-5.9] LOG-5062: align validation with documentation

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2394

/assign jcantrill

[openshift-ci-robot]

@openshift-cherrypick-robot: Ignoring requests to cherry-pick non-bug issues: LOG-5062

In response to this:

This is an automated cherry-pick of #2394

/assign jcantrill

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[vparfonov]

/lgtm

[jcantrill]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill, openshift-cherrypick-robot

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [jcantrill]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

@openshift-cherrypick-robot: all tests passed!

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[vparfonov]

/cherry-pick release-5.8

[openshift-cherrypick-robot]

@vparfonov: #2437 failed to apply on top of branch "release-5.8":

Applying: LOG-5062: align validation function with documentation
Using index info to reconstruct a base tree...
A	internal/controller/forwarding/forwarding_controller_test.go
M	internal/validations/clusterlogging/validate_clusterlogging_spec.go
M	internal/validations/clusterlogging/validate_clusterlogging_spec_test.go
M	internal/validations/clusterlogging/validations.go
Falling back to patching base and 3-way merge...
Auto-merging internal/validations/clusterlogging/validations.go
Auto-merging internal/validations/clusterlogging/validate_clusterlogging_spec_test.go
Auto-merging internal/validations/clusterlogging/validate_clusterlogging_spec.go
CONFLICT (content): Merge conflict in internal/validations/clusterlogging/validate_clusterlogging_spec.go
Auto-merging controllers/forwarding/forwarding_controller_test.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 LOG-5062: align validation function with documentation
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-5.8

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.