Update gRPC and protobuf version constraints in requirements.txt

requirements.txt

@@ -29,8 +29,8 @@ google-cloud-core==2.3.2
 google-crc32c==1.5.0
 google-resumable-media==2.5.0
 googleapis-common-protos==1.59.0
-grpcio==1.51.3
-grpcio-status==1.51.3
+grpcio>=1.48.2
+grpcio-status>=1.48.2
 h11==0.14.0
 httpcore==1.0.7
 httpx==0.28.1
@@ -55,7 +55,7 @@ pillow==11.1.0
 pluggy==1.5.0
 propcache==0.2.1
 proto-plus==1.25.0
-protobuf>=4.21.6,<5.0.0dev
+protobuf>=3.19.5,!=3.20.0,!=3.20.1,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5,<5.0.0dev
 pyarrow==19.0.0
 pyasn1==0.6.1
 pyasn1_modules==0.4.1