[llvm] [JSON][NFC] Move print method out of NDEBUG || DUMP (PR #131639)

[Nikolay Panchenko via llvm-commits]

npanchen wrote:

> I am still not convinced about having this kind of conditional compilation inside a header file (if you do a global search, you will find such an ifdef only in implementation files). However I will let others discuss on this topic, as it may be fine as long as everything works.

Simple grep of `LLVM_ENABLE_DUMP` shows about 55 cases in `llvm/include`. Some of them might not relate to `dump` or `print` methods. The similar one can be is in [`MCAsmMacro`](https://github.com/llvm/llvm-project/blob/main/llvm/include/llvm/MC/MCAsmMacro.h#L127-L130).
I'm fine to drop the use of the macro if that functionality seems nice-to-have for release build, otherwise it's better to keep it 
 under if.

https://github.com/llvm/llvm-project/pull/131639