Build issue fix for Apple Silicon

[sguruvar]

Build issue fix for Apple Silicon. This is required especially with Cloud9 sunsetting.

INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 11.314 s
[INFO] Finished at: 2025-08-13T12:08:45-05:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.spotify:docker-maven-plugin:1.2.0:build (default) on project spring-petclinic-admin-server: Exception caught: java.util.concurrent.ExecutionException: com.spotify.docker.client.shaded.javax.ws.rs.ProcessingException: java.lang.UnsatisfiedLinkError: could not load FFI provider jnr.ffi.provider.jffi.Provider: ExceptionInInitializerError: Can't overwrite cause with java.lang.UnsatisfiedLinkError: java.lang.UnsatisfiedLinkError: /private/var/folders/kz/1z_592nx6r96fw52dbghg9rr0000gq/T/jffi14921921095104775902.dylib: dlopen(/private/var/folders/kz/1z_592nx6r96fw52dbghg9rr0000gq/T/jffi14921921095104775902.dylib, 0x0001): tried: '/private/var/folders/kz/1z_592nx6r96fw52dbghg9rr0000gq/T/jffi14921921095104775902.dylib' (fat file, but missing compatible architecture (have 'i386,x86_64', need 'arm64e' or 'arm64')), '/System/Volumes/Preboot/Cryptexes/OS/private/var/folders/kz/1z_592nx6r96fw52dbghg9rr0000gq/T/jffi14921921095104775902.dylib' (no such file), '/private/var/folders/kz/1z_592nx6r96fw52dbghg9rr0000gq/T/jffi14921921095104775902.dylib' (fat file, but missing compatible architecture (have 'i386,x86_64', need 'arm64e' or 'arm64'))
[ERROR] 	at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)
[ERROR] 	at java.base/jdk.internal.loader.NativeLibraries$NativeLibraryImpl.open(NativeLibraries.java:331)
[ERROR] 	at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:197)
[ERROR] 	at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:139)
[ERROR] 	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2402)
[ERROR] 	at java.base/java.lang.Runtime.load0(Runtime.java:852)
[ERROR] 	at java.base/java.lang.System.load(System.java:2028)
[ERROR] 	at com.kenai.jffi.internal.StubLoader.loadFromJar(StubLoader.java:371)
[ERROR] 	at com.kenai.jffi.internal.StubLoader.load(StubLoader.java:258)
[ERROR] 	at com.kenai.jffi.internal.StubLoader.<clinit>(StubLoader.java:444)

[pxaws]

I think we also need to update prerequisites section in the readme: https://github.com/aws-observability/application-signals-demo/blob/main/README.md. In addition, we should remove the comments about cloud9: https://github.com/aws-observability/application-signals-demo/blob/main/README.md#deploy-via-shell-scripts

[pxaws]

How should people to use this script? We should document it in readme