[AMDGPU] Report only local per-function resource usage when object linking is enabled (#192594) With object linking the linker aggregates resource usage across TUs, so compile-time pessimism and call-graph propagation duplicate the linker's work or pollute its inputs. In this mode, skip the per-callsite conservative bumps in `AMDGPUResourceUsageAnalysis` and assign each resource symbol in `AMDGPUMCResourceInfo` a concrete local constant instead of building call-graph max/or expressions.
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