chore(storage): bump grpc to v1.74.3 (googleapis#12845)

This picks up the patch to fix a race condition in xds, which has been causing multiple integration test failures including googleapis#12785

Author: tritone

storage/go.mod

@@ -26,7 +26,7 @@ require (
 	google.golang.org/genproto v0.0.0-20250603155806-513f23925822
 	google.golang.org/genproto/googleapis/api v0.0.0-20250818200422-3122310a409c
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20250818200422-3122310a409c
-	google.golang.org/grpc v1.74.2
+	google.golang.org/grpc v1.74.3
 	google.golang.org/protobuf v1.36.7
 )
 

storage/go.sum

@@ -119,8 +119,8 @@ google.golang.org/genproto/googleapis/api v0.0.0-20250818200422-3122310a409c h1:
 google.golang.org/genproto/googleapis/api v0.0.0-20250818200422-3122310a409c/go.mod h1:ea2MjsO70ssTfCjiwHgI0ZFqcw45Ksuk2ckf9G468GA=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250818200422-3122310a409c h1:qXWI/sQtv5UKboZ/zUk7h+mrf/lXORyI+n9DKDAusdg=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250818200422-3122310a409c/go.mod h1:gw1tLEfykwDz2ET4a12jcXt4couGAm7IwsVaTy0Sflo=
-google.golang.org/grpc v1.74.2 h1:WoosgB65DlWVC9FqI82dGsZhWFNBSLjQ84bjROOpMu4=
-google.golang.org/grpc v1.74.2/go.mod h1:CtQ+BGjaAIXHs/5YS3i473GqwBBa1zGQNevxdeBEXrM=
+google.golang.org/grpc v1.74.3 h1:Upn9dMUIfuKB8AGEIdaAx21wDy1z/hV+Z3s5SScLkI4=
+google.golang.org/grpc v1.74.3/go.mod h1:CtQ+BGjaAIXHs/5YS3i473GqwBBa1zGQNevxdeBEXrM=
 google.golang.org/protobuf v1.36.7 h1:IgrO7UwFQGJdRNXH/sQux4R1Dj1WAKcLElzeeRaXV2A=
 google.golang.org/protobuf v1.36.7/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=