Enable Cloud Storage Prefix for Remote Build Cache

[smrtfl]

Introduce support for specifying a custom prefix path when storing Gradle build cache entries in remote storage, such as GCS and AWS S3. By allowing a configurable prefix, users can better organize and isolate cache artifacts within a shared storage entity, facilitating multi-project setups and improving cache management.

Features

• Configurable Prefix: Adds a new option to define a prefix path under which all cache entries will be stored in the remote storage.
• Backward Compatibility: If no prefix is specified, the plugin retains its existing behavior, ensuring seamless integration with current configurations.

Example Usage

import androidx.build.gradle.s3buildcache.S3BuildCache
import androidx.build.gradle.s3buildcache.ExportedS3Credentials

plugins {
    id("androidx.build.gradle.s3buildcache")
}
            
buildCache {
    remote(S3BuildCache::class) {
        region = "foo"
        bucketName = "bar"
        prefix = "baz"
        credentials = ExportedS3Credentials("key-id", "secret-key")
    }
}

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