[clang] [clang][AST] Fix positioning of preserve cconv attributes in TypePrinter (PR #147285)

[Erich Keane via cfe-commits]

erichkeane wrote:

> LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-ubuntu-fast` running on `sie-linux-worker` while building `clang` at step 6 "test-build-unified-tree-check-all".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/144/builds/29790
> Here is the relevant piece of the build log for the reference

See: ec75f9c0ee0d6839d9cf9c6ba25c112a0e5048b4

https://github.com/llvm/llvm-project/pull/147285