[llvm-objdump] Default --symbolize-operands for BPF (#184043)
BPF users expect to see basic block labels (e.g. <L0>, <L1>) in
disassembly output
(https://github.com/llvm/llvm-project/pull/95103#issuecomment-3771234810).
Default --symbolize-operands to on for BPF targets when neither
--symbolize-operands nor --no-symbolize-operands is explicitly
specified.
Add --no-symbolize-operands to allow users to opt out.