Fix vk.target_env extensions and remove redundant SD imports. (#1826)

* Remove redundant IREE runtime imports.

* Fix vulkan target env extensions.

apps/stable_diffusion/shark_studio_imports.py

@@ -81,4 +81,3 @@ hiddenimports += [
     if not any(kw in x for kw in blacklist)
 ]
 hiddenimports += [x for x in collect_submodules("iree") if "tests" not in x]
-hiddenimports += ["iree._runtime", "iree._runtime_libs"]

shark/iree_utils/vulkan_target_env_utils.py

@@ -57,7 +57,8 @@ def get_version(triple):
 @functools.cache
 def get_extensions(triple):
     def make_ext_list(ext_list):
-        return ", ".join(ext_list)
+        res = ", ".join(ext_list)
+        return f"[{res}]"
 
     arch, product, os = triple
     if arch == "m1":