[llvm] [llvm-lit][test][NFC] Moved cat command tests into separate lit test file (PR #102366)

[Paul Kirth via llvm-commits]

================
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
----------------
ilovepi wrote:

Instead of adding this file, can we move the existing copy up a directory?that is probably it’s own patch. 

https://github.com/llvm/llvm-project/pull/102366