Support deployment with Bicep files - az bicep build does not output build warnings

[StefanIvemo]

Describe the bug

I've been testing the features implemented by #16857, and have noticed that az bicep build does not output any build warnings.

Command Name
az bicep build

Errors:
Running az bicep build successfully compiles the bicep file to an ARM template but it does not output any build warnings, only errors.

To Reproduce:

You have a bicep file using an API version where types are not available named nsg-1.bicep, this should generate a warning.

nsg-1.bicep

param name string
param securityRules array = []
param location string = resourceGroup().location

resource nsg  'Microsoft.Network/networkSecurityGroups@2020-08-01' = {
    name: name
    location: location
    properties: {
        securityRules: securityRules
    }    
}

output resourceId string = nsg.id

• az bicep build -f .\nsg-1.bicep
  If I run az bicep build -f .\nsg-1.bicep the command will run without any warnings or errors.

• bicep build .\ngs-1.bicep
  If perform a build using Bicep CLI it outputs build warnings.

Expected Behavior

I expect that az bicep build should output build warnings just like Bicep CLI.

Environment Summary

Windows-10-10.0.19041-SP0
Python 3.6.8
Installer: MSI

azure-cli 2.19.1

Additional Context

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @armleads-azure.

Issue Details

---

Describe the bug

I've been testing the features implemented by #16857, and have noticed that az bicep build does not output any build warnings.

Command Name
az bicep build

Errors:
Running az bicep build successfully compiles the bicep file to an ARM template but it does not output any build warnings, only errors.

To Reproduce:

You have a bicep file using an API version where types are not available named nsg-1.bicep, this should generate a warning.

nsg-1.bicep

param name string
param securityRules array = []
param location string = resourceGroup().location

resource nsg  'Microsoft.Network/networkSecurityGroups@2020-08-01' = {
    name: name
    location: location
    properties: {
        securityRules: securityRules
    }    
}

output resourceId string = nsg.id

• az bicep build -f .\nsg-1.bicep
  If I run az bicep build -f .\nsg-1.bicep the command will run without any warnings or errors.

• bicep build .\ngs-1.bicep
  If perform a build using Bicep CLI it outputs build warnings.

Expected Behavior

I expect that az bicep build should output build warnings just like Bicep CLI.

Environment Summary

Windows-10-10.0.19041-SP0
Python 3.6.8
Installer: MSI

azure-cli 2.19.1

Additional Context

Author:	StefanIvemo
Assignees:	-
Labels:	ARM, Service Attention
Milestone:	-

[yonzhan]

bicep

[zhoxing-ms]

@shenglol Could you please take a look at this issue~

[shenglol]

Thanks for reporting this. Will take a look.