Revamped Postman collection to have less nested requests, easier auth…

[Ceredron]

Description

Re-organized the requests to minimize nesting. Less clicks needed.
Removed requests to other API's. These functions (ResourceRegistry etc) are now available in GUI.
Changed to use basic authentication (username:password) for the test tokens instead of a Maskinporten integration. The credentials can be found here https://pedia.altinn.cloud/altinn-2/testing/tools/altinntokengenerator/ .

We now use testdata from Tenor to make it possible to test across team boundaries
https://testdata.skatteetaten.no/
Find a company here with a daglig leder and fill out the Postman variables.
(can also just go to af.tt.altinn.no/TestId/"Hent tilfeldig daglig leder")

Related Issue(s)

• Postman collection ready-to-use #281

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)
• All tests run green

Documentation

• User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)

[Andreass2]

"Initialize and upload" needs to remove existing dialogporten element.

Otherwise it looks much cleaner and so much simpler. Very good job