[BUG] APIM policies rules parsing policies with C# code fail to convert deployable XML into type System.XML.XmlDocument

[GABRIELNGBTUC]

Existing rule

Azure.APIM.CORSPolicy and Azure.APIM.PolicyBase

Description of the issue

When running PSRule against APIM policies that sucessfully deploys on Azure, the rule fails due to being unable to convert the XML of the policy

Error messages

##[error]AZR-000371: apim-name/api-name failed Azure.APIM.PolicyBase with the error 'Cannot convert value "<!-- Add policies as children to the <inbound>, <outbound>, <backend>, and <on-error> elements -->
<policies>
	<!-- Throttle, authorize, validate, cache, or transform the requests -->
	<inbound>
		<base />
		<set-backend-service base-url="{{backend}}" />
		<authentication-managed-identity resource="{{audiencee}}" />
		<set-variable name="originalHost" value="@(context.Rquest.Headers.GetValueOrDefault("X-Original-Host", "NotAvailable"))" />
	</inbound>
	<!-- Control if and how the requests are forwarded to services  -->
	<backend>
		<base />
	</backend>
	<!-- Customize the responses -->
	<outbound>
		<base />
	</outbound>
	<!-- Handle exceptions and customize error responses  -->
	<on-error>
		<base />
	</on-error>
</policies>" to type "System.Xml.XmlDocument". Error: "'X-Original-Host' is an unexpected token. Expecting whitespace. Line 15, position 89."'.

At /usr/local/share/powershell/Modules/PSRule.Rules.Azure/1.39.3/rules/Azure.APIM.Rule.ps1:384 char:21
+         $policies | ForEach-Object {
+                     ~~~~~~~~~~~~~~~~

at <ScriptBlock>, /usr/local/share/powershell/Modules/PSRule.Rules.Azure/1.39.3/rules/Azure.APIM.Rule.ps1: line 386
at global:GetAPIMPolicyNode<Process>, /usr/local/share/powershell/Modules/PSRule.Rules.Azure/1.39.3/rules/Azure.APIM.Rule.ps1: line 384
at <ScriptBlock>, /usr/local/share/powershell/Modules/PSRule.Rules.Azure/1.39.3/rules/Azure.APIM.Rule.ps1: line 326
at Rule 'Azure.APIM.PolicyBase', /usr/local/share/powershell/Modules/PSRule.Rules.Azure/1.39.3/rules/Azure.APIM.Rule.ps1: line 325

Reproduction

Try to run PSRule against a bicep template that deploys the following policy for an API with rawxml as the format

<!--
    - Policies are applied in the order they appear.
    - Position <base/> inside a section to inherit policies from the outer scope.
    - Comments within policies are not preserved.
-->
<!-- Add policies as children to the <inbound>, <outbound>, <backend>, and <on-error> elements -->
<policies>
	<!-- Throttle, authorize, validate, cache, or transform the requests -->
	<inbound>
		<base />
		<set-backend-service base-url="{{backend}}" />
		<authentication-managed-identity resource="{{audiencee}}" />
		<set-variable name="originalHost" value="@(context.Rquest.Headers.GetValueOrDefault("X-Original-Host", "NotAvailable"))" />
	</inbound>
	<!-- Control if and how the requests are forwarded to services  -->
	<backend>
		<base />
	</backend>
	<!-- Customize the responses -->
	<outbound>
		<base />
	</outbound>
	<!-- Handle exceptions and customize error responses  -->
	<on-error>
		<base />
	</on-error>
</policies>

The rule will fails but a deployment of the template to Azure will succeed

Version of PSRule

2.9.0

Version of PSRule for Azure

1.39.3

Additional context

No response