Add secret provider functionality and enhance configuration data resolution

Private/Test-ConfigurationDataSecretReference.ps1

@@ -0,0 +1,14 @@
+function Test-ConfigurationDataSecretReference {
+    [CmdletBinding()]
+    Param(
+        [AllowNull()]
+        $Value
+    )
+
+    if(-not (Test-ConfigurationDataMap -Value $Value)){
+        return $false
+    }
+
+    return (Test-ConfigurationDataMapContainsKey -Map $Value -Key "Provider") -and
+        (Test-ConfigurationDataMapContainsKey -Map $Value -Key "Name")
+}