[FrontDoor] Replace ternary operator for PS 5.1

[isra-fel]

Description

Replace ternary operator (A ? B : C) in the customization code of FrontDoor as it is not supported by PS 5.1

Mandatory Checklist

• Please choose the target release of Azure PowerShell. (⚠️Target release is a different concept from API readiness. Please click below links for details.)

  • General release
  • Public preview
  • Private preview
  • Engineering build
  • No need for a release

• Check this box to confirm: I have read the Submitting Changes section of CONTRIBUTING.md and reviewed the following information:

• SHOULD update ChangeLog.md file(s) appropriately
  • Update src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md.
    • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header in the past tense.
  • Should not change ChangeLog.md if no new release is required, such as fixing test case only.
• SHOULD regenerate markdown help files if there is cmdlet API change. Instruction
• SHOULD have proper test coverage for changes in pull request.
• SHOULD NOT adjust version of module manually in pull request

[azure-client-tools-bot-prd]

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[Copilot]

Pull Request Overview

This PR improves PowerShell 5.1 compatibility by replacing ternary operators (which require PowerShell 7.0+) with traditional if-else statements in two FrontDoor AutoRest cmdlets.

• Replaced all ternary operators with if-else statements to ensure PowerShell 5.1 compatibility
• The logic and default values are preserved correctly across all changes

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/FrontDoor/FrontDoor.Autorest/custom/New-AzFrontDoorRulesEngineActionObject.ps1	Replaced 7 ternary operators with if-else statements for parameter defaults (DynamicCompression, QueryParameterStripDirective, ForwardingProtocol, CustomHost, CustomPath, RedirectProtocol, RedirectType)
src/FrontDoor/FrontDoor.Autorest/custom/New-AzFrontDoorRoutingRuleObject.ps1	Replaced 7 ternary operators with if-else statements for parameter defaults (DynamicCompression, QueryParameterStripDirective, ForwardingProtocol, CustomHost, CustomPath, RedirectProtocol, RedirectType)

[isra-fel]

Replaced by #28831