refactor(distribution): Separate upload and SDK installation controls

[runningcode]

Summary

Refactor the distribution API to provide clearer separation between upload control and auto-update SDK installation.

Note, this does not move the enabled property outside the ignored variants. So enabled only works for variants that are enabled and therefore have sentry enabled.

Key Changes

1. Added enabled property: Controls whether build distribution uploads are enabled

   • Defaults to false
   • Only applies to variants that are not in ignoredVariants

2. Renamed enabledVariants to updateSdkVariants: Clarifies this property controls auto-update SDK installation only, not uploads

3. Updated upload logic: Now checks distribution.enabled instead of variant membership in enabledVariants

4. Added build-time validation:

   • Error if updateSdkVariants contains variants in ignoredVariants
   • Error if updateSdkVariants is set but enabled is false

New API Example

sentry {
  ignoredVariants = setOf("debug")
  
  sizeAnalysis {
    enabled = true // Explicit control over size uploads
  }
  
  distribution {
    enabled = true // Controls build uploads for distribution (only for non-ignored variants)
    updateSdkVariants = setOf("beta") // Controls auto-update SDK installation
  }
}

Migration Guide

Before:

distribution {
  enabledVariants = ["beta"]
}

After:

distribution {
  enabled = true
  updateSdkVariants = ["beta"]
}

🤖 Generated with Claude Code

[chromy]

lgtm