[LoongArch][MC] Pre-commit tests for instr bl fixupkind testing (#72826)

This patch is used to test whether fixupkind for bl can be returned
correctly. When BL has target-flags(loongarch-call), there is no error.
But without this flag, an assertion error will appear. So the test is
just tagged as "Expectedly Failed" now until the following patch fix it.