chore(codegen): set JVM memory size to 4gb (#3046)

Author: AllanZhengYP

codegen/build.gradle.kts

@@ -90,6 +90,10 @@ subprojects {
             useJUnitPlatform()
         }
 
+        tasks.withType<JavaExec> {
+            jvmArgs = listOf<String>("-Xms4g", "-Xmx4g")
+        }
+
         // Apply junit 5 and hamcrest test dependencies to all java projects.
         dependencies {
             testImplementation("org.junit.jupiter:junit-jupiter-api:5.4.0")