Add override for proxy_intercept_errors when using Custom HTTP Errors (#9497)

* added proxy-intercept-errors config option

* fixed error when comparing locations

* fixed missing location config from annotation
added e2e test

* reversed logic for proxy-intercept-errors to disable-proxy-intercept-errors

* reversed logic to disable-proxy-intercept-errors

* reversed logic

* default has to be false

* put comment in same line as return

* run gofmt

* fixing wrong Boilerplate header

* updated code to new IngressAnnotation interface

* fixes to satisfy PR comments

* synced with upstream; fixed typo

* gofumpt disableproxyintercepterrors.go

* gofumpt

internal/ingress/annotations/disableproxyintercepterrors/main_test.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package disableproxyintercepterrors
+
+import (
+	"testing"
+
+	api "k8s.io/api/core/v1"
+	networking "k8s.io/api/networking/v1"
+	meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
+	"k8s.io/ingress-nginx/internal/ingress/resolver"
+)
+
+func buildIngress() *networking.Ingress {
+	return &networking.Ingress{
+		ObjectMeta: meta_v1.ObjectMeta{
+			Name:      "foo",
+			Namespace: api.NamespaceDefault,
+		},
+		Spec: networking.IngressSpec{
+			DefaultBackend: &networking.IngressBackend{
+				Service: &networking.IngressServiceBackend{
+					Name: "default-backend",
+					Port: networking.ServiceBackendPort{
+						Number: 80,
+					},
+				},
+			},
+		},
+	}
+}
+
+func TestParseAnnotations(t *testing.T) {
+	ing := buildIngress()
+
+	_, err := NewParser(&resolver.Mock{}).Parse(ing)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+
+	data := map[string]string{}
+	data[parser.GetAnnotationWithPrefix("disable-proxy-intercept-errors")] = "true"
+	ing.SetAnnotations(data)
+	// test ingress using the annotation without a TLS section
+	_, err = NewParser(&resolver.Mock{}).Parse(ing)
+	if err != nil {
+		t.Errorf("unexpected error parsing ingress with disable-proxy-intercept-errors")
+	}
+}