[LINTER] Enforce using angle brackets in #include directives

Summary: This linter throws an error when a #include "header.h" is encountered.

Test Plan:
Modify src/init.cpp to use double quotes in a #include directive.

arc lint -- src/init.cpp

Check the linter catches the error.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D3319