IVGCVSW-5619 Enable OptimizerOptions for the python external delegate

 * Add reduce-fp32-to-fp16, reduce-fp32-to-bf16, debug-data, memory-import
options to external delegate
 * Simplify DelegateOptions
 * Add test mock models
 * Unit tests
 * Configure lfs to manage tflite files

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I1e4db468862ba03d4cb031347bc307cf940b3cb1
diff --git a/delegate/python/test/test_data/fp32_model.tflite b/delegate/python/test/test_data/fp32_model.tflite
new file mode 100644
index 0000000..15a0cab
--- /dev/null
+++ b/delegate/python/test/test_data/fp32_model.tflite
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:549eeeeb3ee3984cf1636917f8b6c80914b6ce3b7553220c05858fa3d438371b
+size 688