powerplatform_environment: environment_type change triggers update not recreate

[mawasile]

This pull request introduces a new feature to modify the environment type and includes various updates to support this functionality. The changes span multiple files, adding new methods, DTOs, and tests, as well as modifying existing logic to accommodate the new feature.

New Feature: Modify Environment Type

• internal/services/environment/api_environment.go: Added ModifyEnvironmentType method to allow environment type modification.
• internal/services/environment/dto.go: Introduced modifySkuDto for the new environment type modification functionality.
• internal/services/environment/resource_environment.go: Updated Update method to call ModifyEnvironmentType when the environment type changes. Removed RequiresReplace plan modifier for environment_type. [1] [2] [3]

Configuration and Constants

• internal/constants/constants.go: Reordered constants for better readability.
• internal/api/lifecycle.go: Added fallback to HEADER_OPERATION_LOCATION if HEADER_LOCATION is not present.

Testing Enhancements

• internal/services/environment/resource_environment_test.go: Added unit and acceptance tests for validating the new environment type modification feature. [1] [2]
• internal/services/environment/tests/resource/Validate_Update_Environment_Type/get_environment_0.json: Added test data for environment type validation tests.