Rename backtrace_clean_patterns to backtrace_exclude_patterns

This also deprecates backtrace_clean_patterns

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Remove Configuration#cleaned_from_backtrace?

We now use config.backtrace_cleaner.exclude?

Signed-off-by: Sam Phippen <samphippen@googlemail.com>