Add support for Javascript Mutators in Ansible Sensu Go Collection

[miralgj]

Problem:
Sensu Go Ansible modules do not have support for creating Mutators with type javascript (https://docs.sensu.io/sensu-go/latest/observability-pipeline/observe-transform/mutators/#javascript-mutators).

Solution:
Add type and eval parameters to the mutator module with appropriate code to support the new feature. Make command parameter required if type is pipe and make eval required if type is javascript.