devel/spirv-llvm-translator: update to 18.1.2 and 1[4-7].0.2

Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v14.0.2
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v15.0.2
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v16.0.2
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v17.0.2
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v18.1.2
Reported by: GitHub (watch releases)