fix: developer SKU doesn't deploy with null arrays (#2879)

## Description

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Fixes #123
Fixes #456
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Closes #2561

* Default to empty arrays for `zones` and `additionalLocations` instead
of `null`.

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## Type of Change

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- [ ] Update to CI Environment or utilities (Non-module affecting
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- [X] Azure Verified Module updates:
- [X] Bugfix containing backwards-compatible bug fixes, and I have NOT
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- [X] Someone has opened a bug report issue, and I have included "Closes
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## Checklist

- [x] I'm sure there are no other open Pull Requests for the same
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- [x] I have run `Set-AVMModule` locally to generate the supporting
module files.
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---------

Co-authored-by: Tony Box <tobox@microsoft.com>

avm/res/api-management/service/main.bicep

@@ -218,14 +218,14 @@ resource service 'Microsoft.ApiManagement/service@2023-05-01-preview' = {
  name: sku
  capacity: contains(sku, 'Consumption') ? 0 : contains(sku, 'Developer') ? 1 : skuCapacity
  }
- zones: contains(sku, 'Premium') ? zones : null
+ zones: contains(sku, 'Premium') ? zones : []
  identity: identity
  properties: {
  publisherEmail: publisherEmail
  publisherName: publisherName
  notificationSenderEmail: notificationSenderEmail
  hostnameConfigurations: hostnameConfigurations
- additionalLocations: contains(sku, 'Premium') ? additionalLocations : null
+ additionalLocations: contains(sku, 'Premium') ? additionalLocations : []
  customProperties: contains(sku, 'Consumption') ? null : customProperties
  certificates: certificates
  enableClientCertificate: enableClientCertificate ? true : null

avm/res/api-management/service/main.json

@@ -6,7 +6,7 @@
  "_generator": {
  "name": "bicep",
  "version": "0.29.47.4906",
- "templateHash": "6395782495647847617"
+ "templateHash": "17801704016046413855"
  },
  "name": "API Management Services",
  "description": "This module deploys an API Management Service. The default deployment is set to use a Premium SKU to align with Microsoft WAF-aligned best practices. In most cases, non-prod deployments should use a lower-tier SKU.",
@@ -590,14 +590,14 @@
  "name": "[parameters('sku')]",
  "capacity": "[if(contains(parameters('sku'), 'Consumption'), 0, if(contains(parameters('sku'), 'Developer'), 1, parameters('skuCapacity')))]"
  },
- "zones": "[if(contains(parameters('sku'), 'Premium'), parameters('zones'), null())]",
+ "zones": "[if(contains(parameters('sku'), 'Premium'), parameters('zones'), createArray())]",
  "identity": "[variables('identity')]",
  "properties": {
  "publisherEmail": "[parameters('publisherEmail')]",
  "publisherName": "[parameters('publisherName')]",
  "notificationSenderEmail": "[parameters('notificationSenderEmail')]",
  "hostnameConfigurations": "[parameters('hostnameConfigurations')]",
- "additionalLocations": "[if(contains(parameters('sku'), 'Premium'), parameters('additionalLocations'), null())]",
+ "additionalLocations": "[if(contains(parameters('sku'), 'Premium'), parameters('additionalLocations'), createArray())]",
  "customProperties": "[if(contains(parameters('sku'), 'Consumption'), null(), parameters('customProperties'))]",
  "certificates": "[parameters('certificates')]",
  "enableClientCertificate": "[if(parameters('enableClientCertificate'), true(), null())]",