Limiting protobuf to version < 4.0.0 (#11748)

* Upgrade Protobuf to version 3.18.2 in python's requirements

* PaddlePaddle tests requires protobuf < 4.0.0

* ONNX tests use protobuf 3.18

* Python bindings protobuf <4.0.0

src/bindings/python/requirements.txt

@@ -1 +1,2 @@
-numpy>=1.16.6,<1.20
+numpy>=1.16.6,<1.20
+protobuf>=3.18,<4.0.0

src/bindings/python/requirements_test.txt

@@ -32,4 +32,5 @@ radon
 retrying
 tox
 types-pkg_resources
-wheel>=0.36.2
+wheel>=0.36.2
+protobuf>=3.18,<4.0.0

src/core/tests/frontend/paddle/requirements_dev.txt

@@ -3,3 +3,4 @@ paddlepaddle==2.1.0
 gast==0.3.3
 numpy~=1.19.2
 six~=1.15.0
+protobuf<4.0.0

src/core/tests/requirements_test_onnx.txt

@@ -1,4 +1,4 @@
 # ONNX - generate test models
 docopt~=0.6.2
 onnx~=1.11.0
-protobuf>=3.12
+protobuf~=3.18