[llvm] [AsmPrinter] Reduce AsmPrinterHandlers virt. fn calls (PR #96785)

[David Blaikie via llvm-commits]

https://github.com/dwblaikie commented:

@aeubanks - any opinions on the compile time improvement here? (worth it? the complexity change isn't huge)
@JDevlieghere mabe you/someone else with debug info interest might have some opinions on how this changes the debug info handler interface - but it's pretty low impact

https://github.com/llvm/llvm-project/pull/96785