[clang] [Clang][Driver] Enable internalization by default for AMDGPU (PR #138365)

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ronlieb wrote:

also seeing
"PluginInterface" error: Failure to look up global address: Error in hsa_executable_get_symbol_by_name(grid_points): HSA_STATUS_ERROR_INVALID_SYMBOL_NAME: There is no symbol with the given name.
omptarget error: Failed to load symbol grid_points


https://github.com/llvm/llvm-project/pull/138365