fix: update conversion-gen input params

Moving from v1.28.x to v1.31.x changed some of the inputs for the
conversion-gen tool.

Couldn't find change log, but here is the current supported args list
https://github.com/dinhxuanvu/kubernetes/blob/917aa9a8c4658a5cf870ab7e629a73534e3a1808/staging/src/k8s.io/code-generator/cmd/conversion-gen/args/args.go#L35-L63

Author: joekr

Makefile

@@ -140,18 +140,16 @@ manifests: $(CONTROLLER_GEN) ## Generate WebhookConfiguration, ClusterRole and C
 generate: $(CONTROLLER_GEN) $(CONVERSION_GEN) ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
 	$(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./api/..." paths="./exp/api/..."
 	$(CONVERSION_GEN) \
-	    --input-dirs=./api/v1beta1 \
 		--extra-peer-dirs=sigs.k8s.io/cluster-api/api/v1beta1 \
-		--build-tag=ignore_autogenerated_conversions \
-		--output-file-base=zz_generated.conversion \
-		--go-header-file=hack/boilerplate.go.txt $(OUTPUT_BASE)
+		--output-file=zz_generated.conversion.go \
+		--go-header-file=hack/boilerplate.go.txt \
+		./api/v1beta1
 	$(CONVERSION_GEN) \
-	    --input-dirs=./exp/api/v1beta1 \
 		--extra-peer-dirs=sigs.k8s.io/cluster-api/api/v1beta1 \
 		--extra-peer-dirs=github.com/oracle/cluster-api-provider-oci/api/v1beta1 \
-		--build-tag=ignore_autogenerated_conversions \
-		--output-file-base=zz_generated.conversion \
-		--go-header-file=hack/boilerplate.go.txt $(OUTPUT_BASE)
+		--output-file=zz_generated.conversion.go \
+		--go-header-file=hack/boilerplate.go.txt \
+		./exp/api/v1beta1
 
 fmt: ## Run go fmt against code.
 	go fmt ./...