allow to skip cert validation for internal test situations

[raffaeleragni]

Adding the possibility to setup Reqwest client with ignore certificate mode.

This feature is used in cases https is used for non terminated proxies, but when testing internal infrastructure setups eg. when self signed or dev certificates are being used.

This is what I currently need to be able to use goose in the setup I have to load test.

[raffaeleragni]

Changed the comments

[raffaeleragni]

Ok, changed