Fix installation that causes torch conflict

A package in requirements-examples.txt had a dependency on torchvision, and we ended up installing stable release from standard pypi package. And transitively we ended up installing stable torch and uninstalling torch library.

Author: mergennachin

install_executorch.py

@@ -65,7 +65,7 @@ def clean():
             print("ccache not found, skipping ccache cleanup.")
     except (subprocess.CalledProcessError, FileNotFoundError):
         print("ccache not found, skipping ccache cleanup.")
-
+    
     print("Done cleaning build artifacts.")
 
 

install_requirements.py

@@ -142,19 +142,6 @@ def install_requirements(use_pytorch_nightly):
 
 
 def install_optional_example_requirements(use_pytorch_nightly):
-    print("Installing packages in requirements-examples.txt")
-    subprocess.run(
-        [
-            sys.executable,
-            "-m",
-            "pip",
-            "install",
-            "-r",
-            "requirements-examples.txt",
-        ],
-        check=True,
-    )
-
     print("Installing torch domain libraries")
     DOMAIN_LIBRARIES = [
         (
@@ -178,6 +165,19 @@ def install_optional_example_requirements(use_pytorch_nightly):
         check=True,
     )
 
+    print("Installing packages in requirements-examples.txt")
+    subprocess.run(
+        [
+            sys.executable,
+            "-m",
+            "pip",
+            "install",
+            "-r",
+            "requirements-examples.txt",
+        ],
+        check=True,
+    )
+
 
 # Prebuilt binaries for Intel-based macOS are no longer available on PyPI; users must compile from source.
 # PyTorch stopped building macOS x86_64 binaries since version 2.3.0 (January 2024).