Remove APInt/APSInt toString() std::string variants
Remove APInt/APSInt toString() std::string variants

clang 13+ has removed this in favour of a pair of llvm::toString
() helpers inside StringExtras.h to improve compile speed by avoiding
hits on <string> header

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

iovisor/bcc,iovisor/bcc,brendangregg/bcc,iovisor/bcc,iovisor/bcc,iovisor/bcc,brendangregg/bcc,brendangregg/bcc,brendangregg/bcc,brendangregg/bcc