Update dependency io.grpc:grpc-bom to v1.70.0

Author: renovate[bot]

build.gradle

@@ -11,7 +11,7 @@ buildscript {
         projectVersion = '3.2.0-SNAPSHOT'
 
         // https://github.com/grpc/grpc-java/releases
-        grpcVersion = '1.63.0'
+        grpcVersion = '1.70.0'
 
         // https://github.com/google/guava/releases
         guavaVersion = '33.2.1-jre'