Failed transformation

## Describe the bug in a sentence or two.
I get an `java.lang.ClassCastException: com.cloudinary.Transformation cannot be cast to java.lang.String` error when attempting a transformation:
`val transformation = Transformation>().width(1280).crop("scale")`

## Issue Type (Can be multiple)
[ ] Build - Can’t install or import the SDK
[ ] Performance - Performance issues
[x] Behaviour - Functions aren’t working as expected (Such as generate URL)
[x] Documentation - Inconsistency between the docs and behaviour
[ ] Other (Specify)

## Steps to reproduce
```
val transformation = Transformation>().width(1280)
MediaManager.get().upload(uri)
.option(TRANSFORMATION, transformation)
.option(SIGNATURE, photoSignature.signature)
.option(TIMESTAMP, photoSignature.timestamp)
.option(PUBLIC_ID, photoSignature.publicId)
.option(TAG, tag)
.callback(object : UploadCallback {
override fun onStart(requestId: String?) {
callback.onStart()
}

override fun onProgress(requestId: String?, bytes: Long, totalBytes: Long) {
callback.onProgress(bytes = bytes, totalBytes = totalBytes)
}

override fun onSuccess(requestId: String?, resultData: MutableMap?) {
callback.onSuccess(resultData)
}

override fun onError(requestId: String?, error: ErrorInfo?) {
callback.onError(Throwable("CODE ${error?.code}: ${error?.description}"))
}

override fun onReschedule(requestId: String?, error: ErrorInfo?) {
callback.onError(Throwable("CODE ${error?.code}: ${error?.description}"))
}
})
.dispatch()
```

## Error screenshots or Stack Trace (if applicable)
`java.lang.ClassCastException: com.cloudinary.Transformation cannot be cast to java.lang.String
at com.cloudinary.Util.buildUploadParams(Util.java:63)
at com.cloudinary.Uploader.buildUploadParams(Uploader.java:51)
at com.cloudinary.Uploader.uploadLargeParts(Uploader.java:160)
at com.cloudinary.Uploader.uploadLarge(Uploader.java:149)
at com.cloudinary.android.DefaultRequestProcessor.doProcess(DefaultRequestProcessor.java:223)
at com.cloudinary.android.DefaultRequestProcessor.processRequest(DefaultRequestProcessor.java:87)
at com.cloudinary.android.MediaManager.processRequest(MediaManager.java:441)
at com.cloudinary.android.AndroidJobStrategy$UploadJob.doWork(AndroidJobStrategy.java:163)
at androidx.work.Worker$1.run(Worker.java:86)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)`

## Build System
[ ] Maven
[x] Gradle
[ ] Other (Specify)

## Is the issue reproducible only on a specific device?
[x] No
[ ] Yes (specify model + Android version + vendor build number, if applicable)

## Versions and Libraries (fill in the version numbers)
Cloudinary Android SDK version 2.3.1
Android version - 33
Kotlin version - 1.8.10
JVM (of the dev environment) - 17
Gradle - 8.0

Inizia da Util.java:63, dove lo stack trace mostra che vengono costruiti i parametri di upload della trasformazione, quindi segui Uploader.java:51 e il percorso di upload di MediaManager. Riproduci l’esempio Kotlin con Cloudinary Android SDK 2.3.1 e verifica che un upload della trasformazione non generi più ClassCastException e si comporti in modo coerente con la documentazione.

Scritto dal modello di indicizzazione a partire dal testo della issue.