chore: change annotation library (#492)

context: As part of our security scanning efforts, we are using
BlackDuck to scan for Vulnerabilities in the libraries we are using.
Recently, this tool flagged the Statsig Java Backend SDK as containing a
vulnerability in both versions 1.25.0 and the latest 3.0.0. The
vulnerability originates in the referenced Tomcat annotations-api:

Author: weihao-statsig

build.gradle.kts

@@ -51,7 +51,7 @@ dependencies {
     implementation("io.grpc:grpc-netty-shaded:1.71.0")
     implementation("io.grpc:grpc-stub:1.71.0")
     implementation("io.grpc:grpc-protobuf:1.71.0")
-    implementation("org.apache.tomcat:annotations-api:6.0.53")
+    implementation("jakarta.annotation:jakarta.annotation-api:2.1.1")
 }
 
 val sourcesJar by tasks.registering(Jar::class) {
@@ -109,7 +109,9 @@ protobuf {
     generateProtoTasks {
         all().forEach { task ->
             task.plugins {
-                id("grpc")
+                id("grpc") {
+                    option("@generated=omit")
+                }
             }
             task.doLast {
                 val outputPath = task.outputs.files.getAsPath()

src/main/java/grpc/generated/statsig_forward_proxy/StatsigForwardProxyGrpc.java

@@ -1,10 +1,11 @@
 package grpc.generated.statsig_forward_proxy;
 
 import static io.grpc.MethodDescriptor.generateFullMethodName;
+import jakarta.annotation.Generated;
 
 /**
  */
-@javax.annotation.Generated(
+@Generated(
     value = "by gRPC proto compiler (version 1.66.0)",
     comments = "Source: statsig_forward_proxy.proto")
 @io.grpc.stub.annotations.GrpcGenerated