Add the possibility to skip assertions

[tatomyr]

Is your feature request related to a problem? Please describe.

It is not possible to skip an assertion, since --skip-rule option doesn't work for assertions.

Describe the solution you'd like

Either --skip-rule option should accept assertions as rules or we have to implement an option like --skip-assertion.

Describe alternatives you've considered As a workaround we can "skip" an assertion by having two different apis lint configurations.