[clang] [clang][analyzer][NFC] Add more tests of 'StreamChecker' about 'tmpfile' (PR #70540)

[Ben Shi via cfe-commits]

benshi001 wrote:

> The change is good but the title is too general, better is for example "Update CallDescription in StreamChecker for `tmpfile`", and this is not a NFC (it fixes a problem).

Thanks for your reply. I changed this PR to a pure test supplement. And I will create another PR for my change.

https://github.com/llvm/llvm-project/pull/70540