chore: update formatRawProjectTypes to reference schema instead of static database table

[jessicamcinchak]

The project_types database table is very static and this has been causing complaints of 'not found' project types in Notify email templates. Checking against the ODP Schema "ProjectType" definition should ensure a much more up-to-date list and fewer unknowns

Changes:

• Updates the formatRawProjectTypes function to reference the schema instead of making a GraphQL query
• Moves out of requests and into utils since it is no longer async nor requires a permission-scoped $client
• Adds tests
• Adds a polyfill for Intl.ListFormat via https://formatjs.io/docs/polyfills/intl-listformat/ as we see this popup occassionally via Airbrake !

Future planx-new PRs:

• Update function calls chore: refactor formatRawProjectTypes planx-new#3410
• Drop project_types database table

[jessicamcinchak]

[Research] Can we have configurable templates for GovNotify?

[DafyddLlyr]

One small question!