CodeGen from PR 22993 in Azure/azure-rest-api-specs

[Hub Generated] Review request for Microsoft.Insights to add version preview/2023-03-15-preview (#22993)

* Adds base for updating Microsoft.Insights from version preview/2022-08-01-preview to version 2023-03-15-preview

* Updates readme

* Updates API version in new specs and examples

* New api version - 2023-03-15-preview

* Fix Readme

* remove duplications from autorest readme

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Co-authored-by: meydand <t-meday@microsoft.com>
Co-authored-by: Meydan Dayan <meday@microsoft.com>