chore: Fix indexer warning log, due to duplicate dd-javac-plugin-client files

For logs like

```
[main] WARN datadog.trace.bootstrap.AgentJarIndex - Detected duplicate content under 'datadog.compiler.utils.*'. Ensure your content is under a distinct directory.
[main] WARN datadog.trace.bootstrap.AgentJarIndex - Detected duplicate content under 'datadog.compiler.annotations.*'. Ensure your content is under a distinct
```

Author: bric3

gradle/dependencies.gradle

@@ -45,6 +45,9 @@ final class CachedData {
       exclude(dependency('com.github.jnr::'))
       exclude(dependency('org.ow2.asm::'))
 
+      // javac plugin client
+      exclude(dependency('com.datadoghq:dd-javac-plugin-client'))
+
       // moshi and its transitives
       exclude(dependency('com.squareup.moshi::'))