[llvm-size] Switch command line parsing from llvm::cl to OptTable
Part of https://lists.llvm.org/pipermail/llvm-dev/2021-July/151622.html
"Binary utilities: switch command line parsing from llvm::cl to OptTable"
- --totals=false and --totals=0 cannot be used. Omit the option.
- --help-list is removed. This is a cl:: specific option.
OptTable avoids global option collision if we decide to support multiplexing for binary utilities.
Note: because the tool is simple, and its long options are uncommon, I just drop
the one-dash forms except -arch <value> (Darwin style).
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D105598