[llvm] [CodeGen] Don't treat thread local globals as large data (PR #67764)

[Arthur Eubanks via llvm-commits]

aeubanks wrote:

We could move the check for thread local globals into the callers and assert that we don't call `isLargeData` on thread local globals, but the callers are a mix of code that should only deal with non-thread local globals and code that handles all globals, so I went down the route of less code.

https://github.com/llvm/llvm-project/pull/67764