Add managedByExtended to allowed ARM resource top-level properties

[Copilot]

Summary

Added managedByExtended to the list of allowed body top-level properties for ARM resources in compliance with ARM guidelines.

Changes Made

Code Changes

• ✅ Updated allowedBodyTopLevelProperties array in arm-resource-validation.ts to include managedbyextended
• ✅ Updated propertiesBagTracked array in arm-resource-validation.ts to include managedbyextended
• ✅ Updated error message to list all allowed properties: name, type, id, location, properties, tags, plan, sku, etag, managedBy, managedByExtended, identity, kind, zones, systemData, extendedLocation

Documentation Changes

• ✅ Updated body-top-level-properties.md to include managedByExtended and all properties
• ✅ Updated rules.md to include managedByExtended and all properties
• ✅ Fixed casing inconsistencies (extendedLocation)

Testing

• ✅ Updated existing test file body-top-level-properties-real-swagger.json to include managedByExtended property
• ✅ Removed separate test file to consolidate test cases
• ✅ All 90 tests pass successfully
• ✅ Build and lint checks pass

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[raosuhas]

@copilot instead of creating a new json file for the test , can you just update one of the existing files to include these tests ?

[Copilot]

Updated! I've added the managedByExtended property to the existing body-top-level-properties-real-swagger.json file instead of creating a new test file. The separate test file has been removed and the test case now uses the updated existing file. All tests pass. (commit 90d4543)