Add ESAN generic backup/restore parameters to DataProtection 2026-06-01

[skasavajhula]

Why

Ports the ESAN (Elastic SAN) generic backup/restore parameters from the 2024-02-01-preview OpenAPI spec into TypeSpec. These models were dropped during the OpenAPI-to-TypeSpec migration and are needed for the 2026-06-01 stable API version.

What

Adds 3 models gated to 2026-06-01 in models.tsp:

• GenericBackupDatasourceParameters (resourceSelectors: string[])
• GenericRestoreDatasourceCriteria (resourceSelectors: ResourceListSelectionCriteria)
• ResourceListSelectionCriteria (resourceIdentifiers + resourceNameOverrides source-to-target map)

Adds example JSONs for configure-backup and trigger-restore, and regenerates stable/2026-06-01/dataprotection.json.

How

Authored in TypeSpec with @added(Versions.v2026_06_01); compiled with tsp compile (0 warnings, 0 errors). Generated swagger definitions match the original 2024-02-01-preview shapes exactly.

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Next Steps to Merge

Next steps that must be taken to merge this PR:

• ❌ Your PR has breaking changes in the generated SDK for JavaScript (label: BreakingChange-JavaScript-Sdk). Refer to step 3 in the PR workflow diagram.

Important checks have failed. As of today they are not blocking this PR, but in near future they may.
Addressing the following failures is highly recommended:

• ⚠️ The check named Swagger LintDiff has failed. Refer to the check in the PR's 'Checks' tab for details on how to fix it and consult the aka.ms/ci-fix guide

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[github-actions]

API Change Check

APIView identified API level changes in this PR and created the following API reviews

Language	API Review for Package
TypeSpec	Microsoft.DataProtection
Go	sdk/resourcemanager/dataprotection/armdataprotection
JavaScript	@azure/arm-dataprotection
Python	azure-mgmt-dataprotection
C#	Azure.ResourceManager.DataProtectionBackup
Java	com.azure.resourcemanager:azure-resourcemanager-dataprotection

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