PhpDoc: Replace non-standard dict type with array
Summary:
Make static code analysis more correct (which does not also mean less noisy) by replacing "dict" and "dictionary" types in PhpDoc with what they actually are: an array.
The "dictionary" type is not mentioned in `arcanist/src/parser/PhutilTypeSpec.php` either, thus no side effects.
See also related discussions in https://we.phorge.it/D26037 and https://we.phorge.it/D26039#27821
Test Plan: Grep and read the code, use static code analysis.
Reviewers: O1 Blessed Committers, valerio.bozzolan, amybones
Reviewed By: O1 Blessed Committers, valerio.bozzolan, amybones
Subscribers: amybones, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Differential Revision: https://we.phorge.it/D26059