support azurerm 6.13.2

[VeryEarly]

This pull request primarily introduces support for AzureRm version 6.13.2 in the Az.Tools.Migration PowerShell module. The most significant changes include updating the ModuleVersion and ReleaseNotes in the module manifest, modifying the help messages and validation sets for the AzureRmVersion parameter in the Find-AzUpgradeCommandReference and New-AzUpgradeModulePlan functions, and adding error handling for unsupported AzureRm versions in these functions.

Module Manifest Changes:

• powershell-module/Az.Tools.Migration/Az.Tools.Migration.psd1: Updated the ModuleVersion from '11.0.1' to '11.0.2' and changed the ReleaseNotes to reflect the added support for AzureRm version 6.13.2. [1] [2]

Function Parameter Changes:

• powershell-module/Az.Tools.Migration/Functions/Public/Find-AzUpgradeCommandReference.ps1: Updated the HelpMessage and removed the ValidateSet for the AzureRmVersion parameter to include support for '6.13.2'.
• powershell-module/Az.Tools.Migration/Functions/Public/New-AzUpgradeModulePlan.ps1: Updated the HelpMessage for the FromAzureRmVersion parameter to include support for '6.13.2'.

Error Handling for Unsupported Versions:

• powershell-module/Az.Tools.Migration/Functions/Public/Find-AzUpgradeCommandReference.ps1: Added a check for unsupported AzureRm versions and a corresponding error message.
• powershell-module/Az.Tools.Migration/Functions/Public/New-AzUpgradeModulePlan.ps1: Added a similar check for unsupported AzureRm versions and a corresponding error message.

Documentation Updates:

• powershell-module/ChangeLog.md: Updated the change log to reflect the new module version and support for AzureRm version 6.13.2.
• powershell-module/help/Find-AzUpgradeCommandReference.md and powershell-module/help/New-AzUpgradeModulePlan.md: Updated the documentation for the AzureRmVersion and FromAzureRmVersion parameters to include the newly supported version '6.13.2'. [1] [2]

[isra-fel]

All looks good. I just did a search in the repo, can you update this line as well? https://github.com/Azure/azure-powershell-migration/blob/3a40fb7ecac4e2b350427709e5ecc045c4fe44d4/docs/quickstart-migrate-azurerm-to-az-automatically.md?plain=1#L23

[VeryEarly]

All looks good. I just did a search in the repo, can you update this line as well?

https://github.com/Azure/azure-powershell-migration/blob/3a40fb7ecac4e2b350427709e5ecc045c4fe44d4/docs/quickstart-migrate-azurerm-to-az-automatically.md?plain=1#L23

updated