Revert "deps: update dependency io.grpc:grpc-context to v1.70.0 (#2068)" (#2072)

This reverts commit 7a580bf.

Author: lqiu96

pom.xml

@@ -258,7 +258,7 @@
       <dependency>
         <groupId>io.grpc</groupId>
         <artifactId>grpc-context</artifactId>
-        <version>1.70.0</version>
+        <version>1.69.0</version>
       </dependency>
       <dependency>
         <groupId>io.opencensus</groupId>