🌱 Update inline config docs and annotations

[perdasilva]

Description

Addresses enhancement PR reviewer comments by:

• Updates inline configuration documentation
• Adds missing // +unionMember annotation to Inline
• Adds // +kubebuilder:validation:MinProperties=1 validation to Inline to ensure empty configurations {} cannot be specified
• Adds additional admission unit test inc. to test the added validation annotation

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[Copilot]

Pull request overview

This PR improves the inline configuration documentation and adds the +unionMember annotation to the ClusterExtensionConfig.Inline field as suggested by an API review. The changes make the documentation clearer, fix a grammatical error in the original text, and ensure proper union type annotation for the Kubernetes API.

Key Changes:

• Rewrote inline configuration documentation for better clarity and grammar
• Added // +unionMember annotation to the Inline field in ClusterExtensionConfig
• Updated all generated CRD manifests and API documentation to reflect the source changes

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
api/v1/clusterextension_types.go	Updated inline configuration documentation comments and added +unionMember annotation
manifests/experimental.yaml	Generated CRD manifest updated with new documentation text
manifests/experimental-e2e.yaml	Generated E2E CRD manifest updated with new documentation text
helm/olmv1/base/operator-controller/crd/experimental/olm.operatorframework.io_clusterextensions.yaml	Helm CRD manifest updated with new documentation text
docs/api-reference/olmv1-api-reference.md	API reference documentation updated to match source code comments

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.51%. Comparing base (34394ce) to head (6b65cca).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2366      +/-   ##
==========================================
+ Coverage   70.61%   74.51%   +3.90%     
==========================================
  Files          93       93              
  Lines        7333     7333              
==========================================
+ Hits         5178     5464     +286     
+ Misses       1720     1435     -285     
+ Partials      435      434       -1     

Flag	Coverage Δ
e2e	44.47% <ø> (-0.07%)	⬇️
experimental-e2e	48.78% <ø> (+34.83%)	⬆️
unit	58.61% <ø> (ø)

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[tmshort]

/approve

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.

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[pedjak]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pedjak, tmshort

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Needs approval from an approver in each of these files:

• api/OWNERS [pedjak,tmshort]
• docs/OWNERS [pedjak,tmshort]
• helm/OWNERS [pedjak,tmshort]
• internal/operator-controller/OWNERS [pedjak,tmshort]
• manifests/OWNERS [pedjak,tmshort]

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