arm2pulumi: Support pre-selection of tabs with querystrings

[4865783a5d]

Problem description

It would be very useful to be able to bookmark the https://www.pulumi.com/arm2pulumi/ website with pre-selected tabs

Example: https://www.pulumi.com/arm2pulumi?armTemplate=custom&language=csharp

Affected product version(s)

Current version

[susanev]

we should do this for all of our converters