[CS] change 'raise' to 'fail', use '||' instead of 'or'

following the @houndci suggestions. See:
'https://github.com/bbatsov/ruby-style-guide#exceptions'

modified:   lib/punchblock/translator/asterisk/call.rb
modified:   lib/punchblock/translator/asterisk/component/mrcp_prompt.rb
Merge branch 'feature/ast_tts_fallback-asr_support' into develop

update pull request to mainline