[DAC-3526] - Common express updates to redact form answers from tracking by default

…ing by default

Proposed changes

What changed

This allows users of common express to provide an analyticsDataSensitive value to control the analytics data sent by v2.0.0 of the @govuk-one-login/frontend-analytics package.

Why did it change

The breaking change in v2.0.0 of @govuk-one-login/frontend-analytics is that it defaults to a new, more cautious approach, to reporting analytics. This will happen by default if teams update their version of @govuk-one-login/frontend-analytics to v2.0.0.

To retain the current v1.x.x approach to reporting analytics teams need to set the isDataSensitive flag to false, which can be done by providing a analyticsDataSensitive value to the setGTM function in this updated version of common-express.

Users who are still using @govuk-one-login/frontend-analytics v1.x.x will see no change when updating to this version of common express.

Issue tracking

DAC-3597

Checklists

Environment variables or secrets

[ ] No environment variables or secrets were added or changed

[ ] Documented in the README
[ ] Added to deployment repository
[ ] Added to local startup repository

Other considerations

[ ] Update README with any new instructions or tasks

govuk-one-login / ipv-cri-common-express