Add a linter rule for alias functions

Summary: Ref T7409. Adds ArcanistXHPASTLinter::LINT_ALIAS_FUNCTION for linting the use of alias funtions. Based on Generic_Sniffs_PHP_ForbiddenFunctionsSniff. See list of function aliases.

Test Plan: Added unit tests.

Reviewers: epriestley, Blessed Reviewers

Reviewed By: epriestley, Blessed Reviewers

Subscribers: Korvin, epriestley

Maniphest Tasks: T7409

Differential Revision: https://secure.phabricator.com/D12422