Isolate VR Tests to be generic for all WPR features

[jeawhanlee]

Is your feature request related to a problem? Please describe.
We need to isolate VR test to run for any WPR feature we want.
We currently have a dedicated test for VR but we need to update it to be compatible with any WPR feature as desired i.e we need to be able to run it against any WPR feature we enable.

Describe the solution you'd like
We need to update the current VR test to accommodate this new change by parsing an additional argument to the command which is the feature to be enabled. i.e npm run test:vr --f=feature and we can use this to enable it.

Scenario: NO visual regression when feature 'x' is enabled on live template
Given: WPR is activated
And: feature 'x' is enabled
When: open VR URL
And: scroll to the end of page
Then: no VR compared to nowprocket URL

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[MathieuLamiot]

Blocked until we have all-green test results.