Bump google.golang.org/grpc from 1.79.2 to 1.79.3 in /integration-tests

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.79.2 to 1.79.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.79.2...v1.79.3)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-version: 1.79.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

integration-tests/go.mod

@@ -65,7 +65,7 @@ require (
 	golang.org/x/exp v0.0.0-20260218203240-3dfff04db8fa
 	golang.org/x/sync v0.20.0
 	golang.org/x/text v0.34.0
-	google.golang.org/grpc v1.79.2
+	google.golang.org/grpc v1.79.3
 	gopkg.in/guregu/null.v4 v4.0.0
 )