test: refactor executor code with autogenerated protos (#2759)

* test: update executor code

* fix: line and clirr

* Revert "fix: line and clirr"

This reverts commit 28a9022.

* Revert "test: update executor code"

This reverts commit a1218a3.

* feat: update pom.xml

Author: harshachinta

google-cloud-spanner-executor/pom.xml

@@ -93,7 +93,10 @@
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-spanner-executor-v1</artifactId>
-      <version>1.4.0</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>grpc-google-cloud-spanner-executor-v1</artifactId>
     </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>

google-cloud-spanner/pom.xml

@@ -201,7 +201,6 @@
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-spanner-executor-v1</artifactId>
-      <version>1.4.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>