(makefile) Upgrade mikefarah/yq to v4

This PR upgrades the version of yq used in the makefile from
v3@latest to v4@v4.28.1

Makefile

@@ -58,17 +58,17 @@ manifests: yq controller-gen ## Generate manifests e.g. CRD, RBAC etc
 	$(CONTROLLER_GEN) schemapatch:manifests=./crds output:dir=./crds paths=./pkg/operators/...
 
 	@# Add missing defaults in embedded core API schemas
-	$(Q)$(YQ) w --inplace ./crds/operators.coreos.com_clusterserviceversions.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.install.properties.spec.properties.deployments.items.properties.spec.properties.template.properties.spec.properties.containers.items.properties.ports.items.properties.protocol.default TCP
-	$(Q)$(YQ) w --inplace ./crds/operators.coreos.com_clusterserviceversions.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.install.properties.spec.properties.deployments.items.properties.spec.properties.template.properties.spec.properties.initContainers.items.properties.ports.items.properties.protocol.default TCP
+	$(YQ) --inplace '.spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.install.properties.spec.properties.deployments.items.properties.spec.properties.template.properties.spec.properties.containers.items.properties.ports.items.properties.protocol.default="TCP"' ./crds/operators.coreos.com_clusterserviceversions.yaml
+	$(Q)$(YQ) --inplace '.spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.install.properties.spec.properties.deployments.items.properties.spec.properties.template.properties.spec.properties.initContainers.items.properties.ports.items.properties.protocol.default="TCP"' ./crds/operators.coreos.com_clusterserviceversions.yaml
 
 	@# Preserve fields for embedded metadata fields
-	$(Q)$(YQ) w --inplace ./crds/operators.coreos.com_clusterserviceversions.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.install.properties.spec.properties.deployments.items.properties.spec.properties.template.properties.metadata.x-kubernetes-preserve-unknown-fields true
+	$(Q)$(YQ) --inplace '.spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.install.properties.spec.properties.deployments.items.properties.spec.properties.template.properties.metadata.x-kubernetes-preserve-unknown-fields=true' ./crds/operators.coreos.com_clusterserviceversions.yaml
 
 	@# Remove OperatorCondition.spec.overrides[*].lastTransitionTime requirement
-	$(Q)$(YQ) delete --inplace ./crds/operators.coreos.com_operatorconditions.yaml 'spec.versions[*].schema.openAPIV3Schema.properties.spec.properties.overrides.items.required(.==lastTransitionTime)'
+	$(Q)$(YQ) --inplace 'del(.spec.versions[].schema.openAPIV3Schema.properties.spec.properties.overrides.items.required[] | select(. == "lastTransitionTime"))' ./crds/operators.coreos.com_operatorconditions.yaml
 
 	@# Remove status subresource from the CRD manifests to ensure server-side apply works
-	$(Q)for f in ./crds/*.yaml ; do $(YQ) d --inplace $$f status; done
+	$(Q)for f in ./crds/*.yaml ; do $(YQ) --inplace 'del(.status)' $$f; done
 
 	@# Update embedded CRD files.
 	$(Q)go generate ./crds/...
@@ -102,7 +102,7 @@ YQ ?= $(LOCALBIN)/yq
 
 ## Tool Versions
 CONTROLLER_TOOLS_VERSION ?= v0.9.0
-YQ_VERSION ?= latest
+YQ_VERSION ?= v4.28.1
 
 .PHONY: controller-gen
 controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessary.
@@ -112,4 +112,4 @@ $(CONTROLLER_GEN): $(LOCALBIN)
 .PHONY: yq
 yq: $(YQ) ## Download yq locally if necessary.
 $(YQ): $(LOCALBIN)
-	GOBIN=$(LOCALBIN) go install $(GO_INSTALL_OPTS) github.com/mikefarah/yq/v3@$(YQ_VERSION)
+	GOBIN=$(LOCALBIN) go install $(GO_INSTALL_OPTS) github.com/mikefarah/yq/v4@$(YQ_VERSION)