Chore: make dependanbot to open one PR for go dependencies update weekly (#4010)

* make dependatbot to open one PR for go dependencies update weekly

* fix comments

* remove spaces

* fix comments

* make /zapai to update weeklly too

* make v1.5 and v1.6 daily updates

* remove build/tool

---------

Signed-off-by: Paul Yu <[email protected]>

Author: paulyufan2