fix: isHnsEnabled - avm/res/storage/storage-account (Azure#3317)

## Description

Fix Cannot redeploy if EnableHierargicalNamespace is false
Fixes Azure#1522 


## Pipeline Reference



| Pipeline |
| -------- |
|
[![avm.res.storage.storage-account](https://github.com/Agazoth/bicep-registry-modules/actions/workflows/avm.res.storage.storage-account.yml/badge.svg?branch=Agazoth%2FFixRedeployWithisHnsEnabled)](https://github.com/Agazoth/bicep-registry-modules/actions/workflows/avm.res.storage.storage-account.yml)
|

## Type of Change

<!-- Use the checkboxes [x] on the options that are relevant. -->

- [ ] Update to CI Environment or utilities (Non-module affecting
changes)
- [x] Azure Verified Module updates:
- [x] Bugfix containing backwards-compatible bug fixes, and I have NOT
bumped the MAJOR or MINOR version in `version.json`:
- [ ] Someone has opened a bug report issue, and I have included "Closes
#{bug_report_issue_number}" in the PR description.
- [ ] The bug was found by the module author, and no one has opened an
issue to report it yet.
- [ ] Feature update backwards compatible feature updates, and I have
bumped the MINOR version in `version.json`.
- [ ] Breaking changes and I have bumped the MAJOR version in
`version.json`.
  - [ ] Update to documentation

## Checklist

- [x] I'm sure there are no other open Pull Requests for the same
update/change
- [x] I have run `Set-AVMModule` locally to generate the supporting
module files.
- [x] My corresponding pipelines / checks run clean and green without
any errors or warnings

<!-- Please keep up to date with the contribution guide at
https://aka.ms/avm/contribute/bicep -->

avm/res/storage/storage-account/main.bicep

@@ -412,7 +412,7 @@ resource storageAccount 'Microsoft.Storage/storageAccounts@2023-05-01' = {
         }
       : null
     supportsHttpsTrafficOnly: supportsHttpsTrafficOnly
-    isHnsEnabled: enableHierarchicalNamespace ? enableHierarchicalNamespace : null
+    isHnsEnabled: enableHierarchicalNamespace
     isSftpEnabled: enableSftp
     isNfsV3Enabled: enableNfsV3 ? enableNfsV3 : any('')
     largeFileSharesState: (skuName == 'Standard_LRS') || (skuName == 'Standard_ZRS') ? largeFileSharesState : null

avm/res/storage/storage-account/main.json

@@ -1063,7 +1063,7 @@
         "accessTier": "[if(and(not(equals(parameters('kind'), 'Storage')), not(equals(parameters('kind'), 'BlockBlobStorage'))), parameters('accessTier'), null())]",
         "sasPolicy": "[if(not(empty(parameters('sasExpirationPeriod'))), createObject('expirationAction', 'Log', 'sasExpirationPeriod', parameters('sasExpirationPeriod')), null())]",
         "supportsHttpsTrafficOnly": "[parameters('supportsHttpsTrafficOnly')]",
-        "isHnsEnabled": "[if(parameters('enableHierarchicalNamespace'), parameters('enableHierarchicalNamespace'), null())]",
+        "isHnsEnabled": "[parameters('enableHierarchicalNamespace')]",
         "isSftpEnabled": "[parameters('enableSftp')]",
         "isNfsV3Enabled": "[if(parameters('enableNfsV3'), parameters('enableNfsV3'), '')]",
         "largeFileSharesState": "[if(or(equals(parameters('skuName'), 'Standard_LRS'), equals(parameters('skuName'), 'Standard_ZRS')), parameters('largeFileSharesState'), null())]",