🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

noxfile.py

@@ -79,13 +79,15 @@
     "system",
     "mypy",
     "mypy",
+    "mypy",
     "cover",
     "lint",
     "lint_setup_py",
     "blacken",
     "docs",
     "doctests",
     "doctests",
+    "doctests",
     "docfx",
     "format",
 ]
@@ -172,6 +174,22 @@ def mypy(session):
     session.run("mypy", "-p", "google.cloud.datastore")
 
 
+@nox.session(python=DEFAULT_PYTHON_VERSION)
+def mypy(session):
+    """Verify type hints are mypy compatible."""
+    session.install("-e", ".")
+    # Exclude types-protobuf==4.24.0.20240106
+    # See https://github.com/python/typeshed/issues/11254
+    session.install(
+        "mypy",
+        "types-setuptools",
+        "types-mock",
+        "types-protobuf!=4.24.0.20240106",
+        "types-requests",
+    )
+    session.run("mypy", "-p", "google.cloud.datastore")
+
+
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def lint_setup_py(session):
     """Verify that setup.py is valid (including RST check)."""
@@ -311,6 +329,10 @@ def system(session, disable_grpc):
     if disable_grpc:
         env["GOOGLE_CLOUD_DISABLE_GRPC"] = "True"
 
+    env = {}
+    if disable_grpc:
+        env["GOOGLE_CLOUD_DISABLE_GRPC"] = "True"
+
     # Run py.test against the system tests.
     if system_test_exists:
         session.run(
@@ -387,6 +409,10 @@ def doctests(session):
     session.install("mock", "pytest", "sphinx", "google-cloud-testutils")
     session.install("-e", ".")
 
+    env = {}
+    if disable_grpc:
+        env["GOOGLE_CLOUD_DISABLE_GRPC"] = "True"
+
     env = {}
     if disable_grpc:
         env["GOOGLE_CLOUD_DISABLE_GRPC"] = "True"
@@ -402,6 +428,10 @@ def doctests(session):
     session.install("mock", "pytest", "sphinx", "google-cloud-testutils")
     session.install("-e", ".")
 
+    env = {}
+    if disable_grpc:
+        env["GOOGLE_CLOUD_DISABLE_GRPC"] = "True"
+
     # Run py.test against the system tests.
     session.run("py.test", "tests/doctests.py")