Bump the grpc-test group in /test/environment/grpc with 5 updates (#623)

Bumps the grpc-test group in /test/environment/grpc with 5 updates:

| Package | From | To |
| --- | --- | --- |
| [grpcio](https://github.com/grpc/grpc) | `1.64.0` | `1.64.1` |
| [grpcio-health-checking](https://grpc.io) | `1.64.0` | `1.64.1` |
| [grpcio-reflection](https://grpc.io) | `1.64.0` | `1.64.1` |
| [grpcio-testing](https://grpc.io) | `1.64.0` | `1.64.1` |
| [grpcio-tools](https://github.com/grpc/grpc) | `1.64.0` | `1.64.1` |


Updates `grpcio` from 1.64.0 to 1.64.1
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.64.0...v1.64.1)

Updates `grpcio-health-checking` from 1.64.0 to 1.64.1

Updates `grpcio-reflection` from 1.64.0 to 1.64.1

Updates `grpcio-testing` from 1.64.0 to 1.64.1

Updates `grpcio-tools` from 1.64.0 to 1.64.1
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.64.0...v1.64.1)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: grpc-test
- dependency-name: grpcio-health-checking
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: grpc-test
- dependency-name: grpcio-reflection
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: grpc-test
- dependency-name: grpcio-testing
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: grpc-test
- dependency-name: grpcio-tools
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: grpc-test
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

test/environment/grpc/requirements.txt

@@ -1,5 +1,5 @@
-grpcio==1.64.0
-grpcio-health-checking==1.64.0
-grpcio-reflection==1.64.0
-grpcio-testing==1.64.0
-grpcio-tools==1.64.0
+grpcio==1.64.1
+grpcio-health-checking==1.64.1
+grpcio-reflection==1.64.1
+grpcio-testing==1.64.1
+grpcio-tools==1.64.1