Add a linter rule for spacing before opening parenthesis in function calls
Summary: Repurpose ArcanistClosingCallParenthesesXHPASTLinterRule (and rename it to ArcanistCallParenthesesXHPASTLinterRule) to ensure that there is no spacing before opening parenthesis in function calls.
Test Plan: Added test case.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D13796