clang-format: add array-for-each to correct formatting issues

The ARRAY_FOR_EACH() and ARRAY_FOR_EACH_PTR() macros were not
formatting correctly in vs code (and I would guess other
editors).

Add an entry to .clang-format so that the opening brace is on
the same line as the macro.

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>