trunk/096c3b356f9f273e9701557a3b295c0fad202de5: Fix typos in comments, docstrings, and strings across torch (#187076)

Correct "than"/"then" confusions, "it's"/"its" mistakes, and several other

small spelling errors ("no less then", "loose"/"lose", "coorelate",

"sparsr", "an unique" -> "a unique") in comments, docstrings, and error

messages. No functional changes.

Test Plan: Comment/string-only edits; no code behavior affected.

Authored with assistance from an AI assistant.

Pull Request resolved: #187076

Approved by: https://github.com/d4l3k