Unable to parse request payload when creating services on Microsoft.DocumentDB/databaseAccounts

**Bicep version**
Bicep CLI version 0.27.1 (4b41cb6d4b)

**Describe the bug**
When trying to create a `services` child resource on `Microsoft.DocumentDB/databaseAccounts@2024-02-15-preview` it gives me the error that the payload cannot be parsed.

https://learn.microsoft.com/en-us/azure/templates/microsoft.documentdb/2024-02-15-preview/databaseaccounts/services?pivots=deployment-language-bicep#resource-format

**To Reproduce**

```bicep
param cosmosAccountName string
param enableDedicatedGateway bool

resource cosmosAccount 'Microsoft.DocumentDB/databaseAccounts@2024-02-15-preview' = {
name: cosmosAccountName
location: location
kind: 'GlobalDocumentDB'
tags: {
defaultExperience: 'Core (SQL)'
'hidden-cosmos-mmspecial': ''
}
properties: {
publicNetworkAccess: 'Enabled'
enableAutomaticFailover: false
enableMultipleWriteLocations: false
isVirtualNetworkFilterEnabled: false
virtualNetworkRules: []
disableKeyBasedMetadataWriteAccess: false
enableFreeTier: false
enableAnalyticalStorage: false
analyticalStorageConfiguration: {
schemaType: 'WellDefined'
}
databaseAccountOfferType: 'Standard'
enableMaterializedViews: false
defaultIdentity: 'FirstPartyIdentity'
networkAclBypass: 'None'
disableLocalAuth: false
enablePartitionMerge: false
enablePerRegionPerPartitionAutoscale: false
enableBurstCapacity: false
enablePriorityBasedExecution: false
minimalTlsVersion: 'Tls12'
consistencyPolicy: {
defaultConsistencyLevel: 'Session'
maxIntervalInSeconds: 5
maxStalenessPrefix: 100
}
locations: [
{
locationName: 'West Europe'
failoverPriority: 0
isZoneRedundant: false
}
]
cors: []
capabilities: [
{
name: 'EnableServerless'
}
]
ipRules: []
backupPolicy: {
type: 'Periodic'
periodicModeProperties: {
backupIntervalInMinutes: 240
backupRetentionIntervalInHours: 8
backupStorageRedundancy: 'Geo'
}
}
networkAclBypassResourceIds: []
diagnosticLogSettings: {
enableFullTextQuery: 'None'
}
capacity: {
totalThroughputLimit: 4000
}
}

resource dedicatedGateway 'services' = if (enableDedicatedGateway) {
name: 'gateway'
properties: {
instanceCount: 1
instanceSize: 'Cosmos.D4s'
}
}
}
```

**Additional context**

This is being deployed to an existing cosmos db that does not yet have a dedicated gateway.

Error from Azure Portal deployments on the resource group:

```json
{
"code": "DeploymentFailed",
"target": "/subscriptions/xxxx/resourceGroups/dev-rg/providers/Microsoft.Resources/deployments/cosmosDb",
"message": "At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-deployment-operations for usage details.",
"details": [
{
"code": "BadRequest",
"target": "/subscriptions/xxxx/resourceGroups/dev-rg/providers/Microsoft.DocumentDB/databaseAccounts/dev-cosmos/services/gateway",
"message": "Unable to parse request payload. \r\nActivityId: 74d83e42-8fde-4de4-86df-a01a967e3b63, Microsoft.Azure.Documents.Common/2.14.0"
}
]
}
```

Start by reproducing the Bicep deployment from the issue against Microsoft.DocumentDB/databaseAccounts@2024-02-15-preview and inspect the generated services/gateway request. The payload names no repository file or test; done means the documented services child resource deploys successfully without an "Unable to parse request payload" error.

Written by the indexing model from the issue text.