refactor(effects): inline ngrxOnRunEffects type

[L2jLiga]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngrx/platform/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

JetBrains WebStorm can not recognize that ngrxOnRunEffects is implements OnRunEffects

What is the new behavior?

JetBrains WebStorm can recognize that ngrxOnRunEffects is implements OnRunEffects

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[brandonroberts]

This would be a breaking change as you're removing something from the public API that may be in use.

[L2jLiga]

I've checked, onRunEffectsFn isn't exported as public API, is it?

[alex-okrushko]

I like this change. Very well done.