fix(deps): update grpc-java monorepo to v1.70.0

Author: renovate[bot]

providers/flagd/pom.xml

@@ -15,7 +15,7 @@
     <properties>
         <!-- exclusion expression for e2e tests -->
         <testExclusions>**/e2e/*.java</testExclusions>
-        <io.grpc.version>1.69.1</io.grpc.version>
+        <io.grpc.version>1.70.0</io.grpc.version>
         <!-- caution - updating this will break compatibility with older protobuf-java versions -->
         <protobuf-java.min.version>3.25.5</protobuf-java.min.version>
     </properties>