chore: fix prerelease_deps nox session [autoapprove] (googleapis#740)

Source-Link: https://togithub.com/googleapis/synthtool/commit/26c7505b2f76981ec1707b851e1595c8c06e90fc
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:f946c75373c2b0040e8e318c5e85d0cf46bc6e61d0a01f3ef94d8de974ac6790

Author: gcf-owl-bot[bot]

Diff for: .github/.OwlBot.lock.yaml

@@ -13,4 +13,4 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:c43f1d918bcf817d337aa29ff833439494a158a0831508fda4ec75dc4c0d0320
+  digest: sha256:f946c75373c2b0040e8e318c5e85d0cf46bc6e61d0a01f3ef94d8de974ac6790

Diff for: noxfile.py

@@ -212,9 +212,9 @@ def unit(session):
 def install_systemtest_dependencies(session, *constraints):
 
     # Use pre-release gRPC for system tests.
-    # Exclude version 1.49.0rc1 which has a known issue.
-    # See https://github.com/grpc/grpc/pull/30642
-    session.install("--pre", "grpcio!=1.49.0rc1")
+    # Exclude version 1.52.0rc1 which has a known issue.
+    # See https://github.com/grpc/grpc/issues/32163
+    session.install("--pre", "grpcio!=1.52.0rc1")
 
     session.install(*SYSTEM_TEST_STANDARD_DEPENDENCIES, *constraints)
 
@@ -459,8 +459,8 @@ def prerelease_deps(session):
         # dependency of grpc
         "six",
         "googleapis-common-protos",
-        # Exclude version 1.49.0rc1 which has a known issue. See https://github.com/grpc/grpc/pull/30642
-        "grpcio!=1.49.0rc1",
+        # Exclude version 1.52.0rc1 which has a known issue. See https://github.com/grpc/grpc/issues/32163
+        "grpcio!=1.52.0rc1",
         "grpcio-status",
         "google-api-core",
         "proto-plus",