[llvm] [SPIR-V] Add `OpConstantCompositeContinuedINTEL` instruction (PR #129086)

[Viktoria Maximova via llvm-commits]

vmaksimo wrote:

Hi @VyacheslavLevytskyy @MrSidims! 
This PR adds the support for instruction and it works as expected for the "common" cases.
However after one week of debugging I didn't find a way how to fix the `long-constant-array.ll` test failure - continued instruction is being added at the wrong place (made a comment in the `SPIRVModuleAnalysis.cpp`). The test is a copy from Khronos, and I'm curious - is it a real use-case or can we de-prioritize it for now and proceed with the basic support? 

https://github.com/llvm/llvm-project/pull/129086