buckify source_transformation

This PR buckies `source_transformation` and move test files into `test`.

Differential Revision: [D65175911](https://our.internmc.facebook.com/intern/diff/D65175911/)

ghstack-source-id: 250793839
Pull Request resolved: pytorch/executorch#6565

Author: helunwencser

examples/models/llama/source_transformation/TARGETS

@@ -0,0 +1,33 @@
+load("@fbcode_macros//build_defs:python_library.bzl", "python_library")
+
+oncall("executorch")
+
+python_library(
+    name = "lib",
+    srcs = [
+        "__init__.py",
+    ],
+    deps = [
+        ":source_transformation",
+    ],
+)
+
+python_library(
+    name = "source_transformation",
+    srcs = [
+        "apply_spin_quant_r1_r2.py",
+        "lora.py",
+        "pre_quantization.py",
+        "prune_vocab.py",
+        "quantized_kv_cache.py",
+        "quantize.py",
+        "rms_norm.py",
+        "rope.py",
+        "sdpa.py",
+        "spin_quant.py",
+        "vulkan_rope.py",
+    ],
+    deps = [
+        "//caffe2:torch",
+    ],
+)

examples/models/llama/source_transformation/test/TARGETS

@@ -0,0 +1,19 @@
+load("@fbcode_macros//build_defs:python_unittest.bzl", "python_unittest")
+
+oncall("executorch")
+
+python_unittest(
+    name = "source_transformation",
+    srcs = [
+        "test_quantized_kv_cache.py",
+        "test_sdpa_with_quantized_kv_cache.py",
+    ],
+    preload_deps = [
+        "//executorch/extension/llm/custom_ops:custom_ops_aot_lib",
+    ],
+    deps = [
+        "fbsource//third-party/pypi/pytest:pytest",
+        "//executorch/examples/models/llama/source_transformation:lib",
+        "//executorch/examples/models/llama:llama_transformer",
+    ],
+)