Check in test script for uv run <url> (astral-sh#7708)

Merge before astral-sh#6375 (see
astral-sh#6375 (comment))

This is testing a couple of things at once, and I'm happy to strip back
to something more simple (i.e., "just" printing).
However, I figured it would be useful to ensure that the PEP 723
metadata correctly works as well as that
additional arguments are correctly forwarded to the Python program.

cc: @BurntSushi

scripts/uv-run-remote-script-test.py

@@ -0,0 +1,13 @@
+# This file is used to test `uv run <url>` in ../crates/uv/tests/run.rs
+# /// script
+# requires-python = ">=3.11"
+# dependencies = [
+#   "rich==13.8.1",
+# ]
+# ///
+import sys
+
+import rich
+
+who = sys.argv[1]
+rich.print(f"Hello {who}, from uv!")