chore(codegen): increase JVM memory size (#3253)

Author: AllanZhengYP

codegen/build.gradle.kts

@@ -90,10 +90,6 @@ 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")

codegen/sdk-codegen/gradle.properties

@@ -1,2 +1,3 @@
 modelsDirProp=aws-models
-defaultsModeConfigOutput=../../packages/smithy-client/src/defaults-mode.ts
+defaultsModeConfigOutput=../../packages/smithy-client/src/defaults-mode.ts
+org.gradle.jvmargs=-Xmx4g -Xms4g