Rename ManiphestTaskQuery::withProjects() to withAllProjects()

Summary: After D3630, make the API more clear: withAllProjects() vs withAnyProjects()

Test Plan: Loaded project page, maniphest task query, reports, filtered by project and "noproject". Grep.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1610

Differential Revision: https://secure.phabricator.com/D3631