[BE][Ez]: Enable ruff rule PLW1507. os.environ is not copied (pytorch#154120)

Enables a RUFF rule check against copying os.environ since its' actually a proxy object, not a dict so a shallow copy will be a noop which is rarely desired behavior.
Pull Request resolved: pytorch#154120
Approved by: https://github.com/malfet

Author: Skylion007

pyproject.toml

@@ -168,6 +168,7 @@ select = [
     "PLW0406", # import self
     "PLW0711", # binary op exception
     "PLW1501", # bad open mode
+    "PLW1507", # shallow copy os.environ
     "PLW1509", # preexec_fn not safe with threads
     "PLW2101", # useless lock statement
     "PLW3301", # nested min max