Should not show completions when inside a multi-line and single-line incomplete string

[majastrz]

Bicep version
Latest from main

Describe the bug
We should not show completions when inside a multi-line string.

To Reproduce
Move the cursor to the location designated with | below and request completions (Ctrl+Space by default):

param myInput string

resource script 'Microsoft.Resources/deploymentScripts@2020-10-01' = {
  name: myInput
  kind: 'AzurePowerShell'
  location: resourceGroup().location
  properties: {
    azPowerShellVersion: '3.0'
    retentionInterval: 'PT6H'
    scriptContent: '''
      Write-Output |
'''
  }
}

output myOutput string = myInput

Additional context