Dynamic parameter names are lost on upgrade operation

[keithbabinec]

Component
[x] PowerShell module
[x] VSCode extension
[] Other

Description of the issue
Dynamic parameter names are lost when Invoke-AzUpgradeModulePlan is run.

Describe how to reproduce the issue
Run the module upgrade against the sample file for 'dynamic-parameters-test1.ps1'

Error output

VERBOSE: [C:\src2\azure-powershell-migration\common\code-upgrade-samples\azurerm\dynamic-parameters-test1.ps1] Reading
file contents.
VERBOSE: [dynamic-parameters-test1.ps1:7:6] Updating CmdletParameter DynamicUserParam2 to .
VERBOSE: [dynamic-parameters-test1.ps1:6:6] Updating CmdletParameter DynamicUserParam1 to .
VERBOSE: [dynamic-parameters-test1.ps1:3:1] Updating Cmdlet New-AzureRmResourceGroupDeployment to
New-AzResourceGroupDeployment.
VERBOSE: [C:\src2\azure-powershell-migration\common\code-upgrade-samples\azurerm\dynamic-parameters-test1.ps1] Saving
file contents in place.
VERBOSE: Module configuration file C:\Users\kebab\.aztoolsmigration\module-preferences.json exists, loading it now.
VERBOSE: Data collection option is enabled. Sending 'Upgrade' operation metrics.
VERBOSE: Operation duration: 00:00:02.4964723