[llvm] [BPF] Do not allow gotol in the middle of asm insn (PR #144545)

[via llvm-commits]

yonghong-song wrote:

Previously this change is embedded in https://github.com/llvm/llvm-project/pull/133856 (support jump table). Now I intend to remove it and have a separate patch to make it explicit.

https://github.com/llvm/llvm-project/pull/144545