[Microsoft.App] Add back x-ms-client-flatten to ConnectedEnvironmentsDaprComponents.json to avoid breaking change

[jijohn14]

ARM (Control Plane) API Specification Update Pull Request

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• New resource provider.
• New API version for an existing resource provider. (If API spec is not defined in TypeSpec, the PR should have been created in adherence to OpenAPI specs PR creation guidance).
• Update existing version for a new feature. (This is applicable only when you are revising a private preview API version.)
• Update existing version to fix OpenAPI spec quality issues in S360.
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Due diligence checklist

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• I confirm this PR is modifying Azure Resource Manager (ARM) related specifications, and not data plane related specifications.
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  ARM resource provider contract and
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Additional information

Viewing API changes

For convenient view of the API changes made by this PR, refer to the URLs provided in the table
in the Generated ApiView comment added to this PR. You can use ApiView to show API versions diff.

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Generated ApiView

Language	Package Name	ApiView Link
Go	sdk/resourcemanager/appcontainers/armappcontainers	https://apiview.dev/Assemblies/Review/77a1e1c7ff4c495e8e1c9cf369fdf74a?revisionId=b8d4ace39fa54d2cac626d493154f0d0
Java	azure-resourcemanager-appcontainers	https://apiview.dev/Assemblies/Review/7da9ac1e2db64477ada2ba8bbb71169b?revisionId=b395511aa58348a389fe40cc4ffac7f5
JavaScript	@azure/arm-appcontainers	https://apiview.dev/Assemblies/Review/ba41cd9978b542efb0688a072b2319a1?revisionId=d6f4cf6fdc4b4e078eb96eb79cd34075
Python	azure-mgmt-appcontainers	https://apiview.dev/Assemblies/Review/1693ff33eb9c4a86a7684539954c49cf?revisionId=c55eb8e336e748c9afbf7e230c5f81d8
Swagger	Microsoft.App	https://apiview.dev/Assemblies/Review/53999dbad23b45cba7812a00a713cab8?revisionId=72e9c7e3f05d4cd989af258768cc4543