🐛 Fix item validation for unhashable markers

[sbueringer]

Signed-off-by: Stefan Büringer buringerst@vmware.com

Today items validation with unhasable markers is broken (e.g. enum).

Example:

	// This tests slice item validation with enum
	// +kubebuilder:validation:items:Enum=0;1;3
	EnumSlice []int `json:"enumSlice,omitempty"`

Leads to the following error

panic: runtime error: hash of unhashable type markers.Enum

goroutine 1 [running]:
sigs.k8s.io/controller-tools/pkg/crd.applyMarkers(0x1400bdab4a8, 0x140035f2270, 0x14013acd400, {0x104b57828, 0x140021ce240})
        /Users/buringerst/code/src/sigs.k8s.io/controller-tools/pkg/crd/schema.go:139 +0x784
sigs.k8s.io/controller-tools/pkg/crd.structToSchema(0x1400bdab4a8, 0x140032104c8)
        /Users/buringerst/code/src/sigs.k8s.io/controller-tools/pkg/crd/schema.go:458 +0x824
sigs.k8s.io/controller-tools/pkg/crd.typeToSchema(0x1400bdab4a8, {0x104b5a4d0, 0x140032104c8})
        /Users/buringerst/code/src/sigs.k8s.io/controller-tools/pkg/crd/schema.go:207 +0x90

[sbueringer]

This line failed if a marker is unhashable (e.g. Enum)

[alvaroaleman]

Thanks!

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: bbaf90701b62d2fd080364b56706b2309fcb3db0

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alvaroaleman, sbueringer

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