Update Error Prone version to 2.34.0

And pass `--should-stop=ifError=FLOW`, see https://github.com/google/error-prone/releases/tag/v2.34.0

PiperOrigin-RevId: 687476556

pom.xml

@@ -89,7 +89,7 @@
     <guava.version>32.1.3-jre</guava.version>
     <truth.version>1.4.0</truth.version>
     <jspecify.version>1.0.0</jspecify.version>
-    <errorprone.version>2.32.0</errorprone.version>
+    <errorprone.version>2.34.0</errorprone.version>
     <auto-value.version>1.9</auto-value.version>
     <auto-service.version>1.0.1</auto-service.version>
     <maven-javadoc-plugin.version>3.6.3</maven-javadoc-plugin.version>
@@ -196,6 +196,7 @@
           <compilerArgs>
             <!-- compile-time arguments for google-java-format -->
             <arg>-XDcompilePolicy=simple</arg>
+            <arg>--should-stop=ifError=FLOW</arg>
             <arg>-Xplugin:ErrorProne</arg>
             <arg>--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED</arg>
             <arg>--add-exports=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED</arg>