[llvm] undo breaking changes from "Reduce AsmPrinterHandlers virt. fn calls" without reverting the performance gains (PR #122297)

[Alexis Engelke via llvm-commits]

aengelke wrote:

Ok. Could you update the PR title an description (which will become the commit message) to reflect the current changes and follow the [commit message](https://llvm.org/docs/DeveloperPolicy.html#commit-messages) guidelines? Will merge once updated.

https://github.com/llvm/llvm-project/pull/122297