Move actions to notification

[lunny]

As title.

[codecov-io]

Codecov Report

Merging #8785 into master will decrease coverage by 0.01%.
The diff coverage is 40.24%.

@@            Coverage Diff             @@
##           master    #8785      +/-   ##
==========================================
- Coverage   41.27%   41.25%   -0.02%     
==========================================
  Files         542      543       +1     
  Lines       69715    69766      +51     
==========================================
+ Hits        28774    28782       +8     
- Misses      37258    37291      +33     
- Partials     3683     3693      +10

Impacted Files	Coverage Δ
services/issue/issue.go	23.68% <ø> (-6.21%)	⬇️
services/pull/pull.go	33.75% <100%> (-6.05%)	⬇️
modules/notification/notification.go	75.75% <100%> (+0.24%)	⬆️
modules/notification/webhook/webhook.go	40.18% <25.8%> (-1.1%)	⬇️
modules/notification/action/action.go	45.83% <45.83%> (ø)
modules/sync/unique_queue.go	78.57% <0%> (-10.72%)	⬇️
models/unit.go	62.16% <0%> (-5.41%)	⬇️
modules/process/manager.go	78.37% <0%> (-4.06%)	⬇️
modules/notification/base/null.go	65.21% <0%> (ø)	⬆️
... and 2 more

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