Update grpcio to v1.78.1 (#1033)

| datasource | package                | from   | to     |
| ---------- | ---------------------- | ------ | ------ |
| pypi       | grpcio                 | 1.78.0 | 1.78.1 |
| pypi       | grpcio-health-checking | 1.78.0 | 1.78.1 |
| pypi       | grpcio-reflection      | 1.78.0 | 1.78.1 |
| pypi       | grpcio-testing         | 1.78.0 | 1.78.1 |
| pypi       | grpcio-tools           | 1.78.0 | 1.78.1 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/environment/grpc/requirements.txt

@@ -1,5 +1,5 @@
-grpcio==1.78.0
-grpcio-health-checking==1.78.0
-grpcio-reflection==1.78.0
-grpcio-testing==1.78.0
-grpcio-tools==1.78.0
+grpcio==1.78.1
+grpcio-health-checking==1.78.1
+grpcio-reflection==1.78.1
+grpcio-testing==1.78.1
+grpcio-tools==1.78.1

test/requirements.ci.txt

@@ -1,5 +1,5 @@
 docker==7.1.0
-grpcio==1.78.0
+grpcio==1.78.1
 protobuf==6.33.5
 requests==2.32.5
 urllib3==2.6.3