[compiler-rt] [compiler-rt][test] Move tmp dir creation with env to where dir is run (PR #106252)

[Connie Zhu via llvm-commits]

connieyzhu wrote:

CC: @david-xl @aeubanks @ilovepi Hi there, I put up this patch because I don't think this test was written to do what was intended. What was the purpose for setting `LLVM_PROFILE_FILE` temporarily?

https://github.com/llvm/llvm-project/pull/106252