Add debug utilities for Vulkan

Features:
- Debug-only tracking of objects by type. See
get_driver_allocs_by_object_type et al.
 - Debug-only Breadcrumb info for debugging GPU crashes and device lost
 - Performance report per frame from get_perf_report
- Some VMA calls had to be modified in order to insert the necessary
memory callbacks

Functionality marked as "debug-only" is only available in debug or dev
builds.

Misc fixes:
 - Early break optimization in RenderingDevice::uniform_set_create

============================

The work was performed by collaboration of TheForge and Google. I am
merely splitting it up into smaller PRs and cleaning it up.

misc/scripts/validate_extension_api.sh

@@ -8,6 +8,7 @@ fi
 
 if [ $# != 1 ]; then
   echo "Usage: @0 <path-to-godot-executable>"
+  exit 1
 fi
 
 api_validation_dir="$( dirname -- "$( dirname -- "${BASH_SOURCE[0]//\.\//}" )" )/extension_api_validation/"