Add a linter rule for logical operators

Summary:
Ref T7409. Adds ArcanistXHPASTLinter::LINT_LOGICAL_OPERATORS for advising:

• && in favor of and.
• || in favor of or.

Based on Squiz_Sniffs_Operators_ValidLogicalOperatorsSniff.

Test Plan: Added test cases.

Reviewers: Blessed Reviewers, epriestley

Reviewed By: Blessed Reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7409

Differential Revision: https://secure.phabricator.com/D12376