rebase: bump google.golang.org/grpc from 1.59.0 to 1.60.1

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.59.0 to 1.60.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.59.0...v1.60.1)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/google.golang.org/appengine/internal/api_common.go

@@ -5,20 +5,26 @@
 package internal
 
 import (
+	"context"
 	"errors"
 	"os"
 
 	"github.com/golang/protobuf/proto"
-	netcontext "golang.org/x/net/context"
 )
 
+type ctxKey string
+
+func (c ctxKey) String() string {
+	return "appengine context key: " + string(c)
+}
+
 var errNotAppEngineContext = errors.New("not an App Engine context")
 
-type CallOverrideFunc func(ctx netcontext.Context, service, method string, in, out proto.Message) error
+type CallOverrideFunc func(ctx context.Context, service, method string, in, out proto.Message) error
 
 var callOverrideKey = "holds []CallOverrideFunc"
 
-func WithCallOverride(ctx netcontext.Context, f CallOverrideFunc) netcontext.Context {
+func WithCallOverride(ctx context.Context, f CallOverrideFunc) context.Context {
 	// We avoid appending to any existing call override
 	// so we don't risk overwriting a popped stack below.
 	var cofs []CallOverrideFunc
@@ -26,10 +32,10 @@ func WithCallOverride(ctx netcontext.Context, f CallOverrideFunc) netcontext.Con
 		cofs = append(cofs, uf...)
 	}
 	cofs = append(cofs, f)
-	return netcontext.WithValue(ctx, &callOverrideKey, cofs)
+	return context.WithValue(ctx, &callOverrideKey, cofs)
 }
 
-func callOverrideFromContext(ctx netcontext.Context) (CallOverrideFunc, netcontext.Context, bool) {
+func callOverrideFromContext(ctx context.Context) (CallOverrideFunc, context.Context, bool) {
 	cofs, _ := ctx.Value(&callOverrideKey).([]CallOverrideFunc)
 	if len(cofs) == 0 {
 		return nil, nil, false
@@ -37,7 +43,7 @@ func callOverrideFromContext(ctx netcontext.Context) (CallOverrideFunc, netconte
 	// We found a list of overrides; grab the last, and reconstitute a
 	// context that will hide it.
 	f := cofs[len(cofs)-1]
-	ctx = netcontext.WithValue(ctx, &callOverrideKey, cofs[:len(cofs)-1])
+	ctx = context.WithValue(ctx, &callOverrideKey, cofs[:len(cofs)-1])
 	return f, ctx, true
 }
 
@@ -45,23 +51,35 @@ type logOverrideFunc func(level int64, format string, args ...interface{})
 
 var logOverrideKey = "holds a logOverrideFunc"
 
-func WithLogOverride(ctx netcontext.Context, f logOverrideFunc) netcontext.Context {
-	return netcontext.WithValue(ctx, &logOverrideKey, f)
+func WithLogOverride(ctx context.Context, f logOverrideFunc) context.Context {
+	return context.WithValue(ctx, &logOverrideKey, f)
 }
 
 var appIDOverrideKey = "holds a string, being the full app ID"
 
-func WithAppIDOverride(ctx netcontext.Context, appID string) netcontext.Context {
-	return netcontext.WithValue(ctx, &appIDOverrideKey, appID)
+func WithAppIDOverride(ctx context.Context, appID string) context.Context {
+	return context.WithValue(ctx, &appIDOverrideKey, appID)
+}
+
+var apiHostOverrideKey = ctxKey("holds a string, being the alternate API_HOST")
+
+func withAPIHostOverride(ctx context.Context, apiHost string) context.Context {
+	return context.WithValue(ctx, apiHostOverrideKey, apiHost)
+}
+
+var apiPortOverrideKey = ctxKey("holds a string, being the alternate API_PORT")
+
+func withAPIPortOverride(ctx context.Context, apiPort string) context.Context {
+	return context.WithValue(ctx, apiPortOverrideKey, apiPort)
 }
 
 var namespaceKey = "holds the namespace string"
 
-func withNamespace(ctx netcontext.Context, ns string) netcontext.Context {
-	return netcontext.WithValue(ctx, &namespaceKey, ns)
+func withNamespace(ctx context.Context, ns string) context.Context {
+	return context.WithValue(ctx, &namespaceKey, ns)
 }
 
-func NamespaceFromContext(ctx netcontext.Context) string {
+func NamespaceFromContext(ctx context.Context) string {
 	// If there's no namespace, return the empty string.
 	ns, _ := ctx.Value(&namespaceKey).(string)
 	return ns
@@ -70,14 +88,14 @@ func NamespaceFromContext(ctx netcontext.Context) string {
 // FullyQualifiedAppID returns the fully-qualified application ID.
 // This may contain a partition prefix (e.g. "s~" for High Replication apps),
 // or a domain prefix (e.g. "example.com:").
-func FullyQualifiedAppID(ctx netcontext.Context) string {
+func FullyQualifiedAppID(ctx context.Context) string {
 	if id, ok := ctx.Value(&appIDOverrideKey).(string); ok {
 		return id
 	}
 	return fullyQualifiedAppID(ctx)
 }
 
-func Logf(ctx netcontext.Context, level int64, format string, args ...interface{}) {
+func Logf(ctx context.Context, level int64, format string, args ...interface{}) {
 	if f, ok := ctx.Value(&logOverrideKey).(logOverrideFunc); ok {
 		f(level, format, args...)
 		return
@@ -90,7 +108,7 @@ func Logf(ctx netcontext.Context, level int64, format string, args ...interface{
 }
 
 // NamespacedContext wraps a Context to support namespaces.
-func NamespacedContext(ctx netcontext.Context, namespace string) netcontext.Context {
+func NamespacedContext(ctx context.Context, namespace string) context.Context {
 	return withNamespace(ctx, namespace)
 }