LLBC-linker and NVPTX: do not strip debug when PTX ISA version >= 7.0 #147672
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Related to #99248
With the version bump of llvm happening a while back it's possible to not strip debug symbols in llbc-linker for the nvptx target in a lot of useful cases.
Instead of always stripping for nvptx64 the new behavior is to look at
target-featureandtarget-cpuand strip for combinations that produce old enough ptx isa version to trigger the bug.