feat: Rework provider configuration fields

[sfc-gh-jmichalak]

• extract env names
• add an entry to migration guide
• add tests for invalid configurations
• improve validations

Test Plan

• [x] acceptance tests
• [ ] …

References

Open topics

• Do we want to move doc helpers to a common package? We could reuse some functions with the resource package.

TODO

• add new fields from the doc
• more advanced testing will be done in tickets for auth flows and for config hierarchy
• use helpers to get values from the schema

[github-actions[bot]]

Integration tests cancelled for 92ac5c04f1c75e2b274a1b7f55823e5f5f5dc90a

[github-actions[bot]]

Integration tests failure for 2e641f60b6ae942480f64a9bf14816e25bf41563

[github-actions[bot]]

Integration tests failure for 075be188551fe6d40f335dab2bdfd11f2fc8744a

[github-actions[bot]]

Integration tests failure for 9f15217972c53739d32ee705d6698d6bfc749f79

[github-actions[bot]]

Integration tests success for 4c95204e83774e1396e0c92ef46b44987a2650cb

[github-actions[bot]]

Integration tests failure for fdb784e81346e417ec44c078d31588bfcb7bd295