[ARM] Microsoft.Resources/deployments API version 2026-06-01 (#43564)

* Add 2026-06-01 API version. Add prediction and symbolic name path fields.

* Copy 2025-04-01 examples.

* Update example API version to 2026-06-01.

* npx tsp compile .

* Remove extension config item type.

* Add resourceType to WhatIfChange because resourceType is part of the identifiers of an extensible resource.

* npx tsp compile .

* Add configHash to DeploymentExtensionDefinition. Deployments can generate this for stacks so stacks can know which configuration to use when there are multiple configs with the same config ID (deployment target ID).

* npx tsp compile.

* Drop.

* Service yaml update.

* Fix Avacado errors.

* Typo.

* Remove "symbolicNamePath" as an identifier as array-based proeprty is not supported. API does allow multiple entries with the same symbolic name path as well.