Image aliases (acr or bash) not available for az acr run --platform windows

The images aliases documented here are not available when running a task with `--platform windows`:


## To Reproduce

### `bash` not available

```
# HelloWorld.yaml
version: v1.1.0
steps:
- cmd: bash echo "Running {{.Run.TaskName}} task {{.Run.ID}} on {{.Run.OS}} {{.Run.Architecture}}"
```

```console
> az acr run --registry mycr --platform windows --file .\HelloWorld.yaml .
Packing source code into tar to upload...
Uploading archived source code from 'C:\Users\mateuszl\AppData\Local\Temp\cli_source_archive_3feaa7daa5b941158615bf49b1d6af03.tar.gz'...
Sending context (1.832 KiB) to registry: mycr...
Queued a run with ID: db3d
Waiting for an agent...
2022/08/08 19:39:30 Downloading source code...
2022/08/08 19:39:35 Finished downloading source code
2022/08/08 19:39:37 Alias support enabled for version >= 1.1.0, please see https://aka.ms/acr/tasks/task-aliases for more information.
2022/08/08 19:39:38 Creating Docker network: acb_default_network, driver: 'nat'
2022/08/08 19:39:38 Successfully set up Docker network: acb_default_network
2022/08/08 19:39:38 Setting up Docker configuration...
2022/08/08 19:39:48 Successfully set up Docker configuration
2022/08/08 19:39:48 Logging in to registry: mycr.azurecr.io
2022/08/08 19:39:52 Successfully logged into mycr.azurecr.io
2022/08/08 19:39:52 Executing step ID: acb_step_0. Timeout(sec): 600, Working directory: '', Network: 'acb_default_network'
2022/08/08 19:39:52 Launching container with name: acb_step_0
Unable to find image 'bash:latest' locally
latest: Pulling from library/bash
ab6db1bc80d0: Pulling fs layer
a4fcbab32bb6: Pulling fs layer
00bf0ebb3446: Pulling fs layer
00bf0ebb3446: Verifying Checksum
00bf0ebb3446: Download complete
a4fcbab32bb6: Verifying Checksum
a4fcbab32bb6: Download complete
ab6db1bc80d0: Download complete
ab6db1bc80d0: Pull complete
a4fcbab32bb6: Pull complete
00bf0ebb3446: Pull complete
Digest: sha256:c5c2c08887c018533b1f04a79521fd7466c61f14f23d302b2de5a49caedc8f63
Status: Downloaded newer image for bash:latest
docker: Error response from daemon: the working directory 'c:\workspace' is invalid, it needs to be an absolute path.
See 'docker run --help'.
2022/08/08 19:39:57 Container failed during run: acb_step_0. No retries remaining.
failed to run step ID: acb_step_0: exit status 1

Run ID: db3d failed after 29s. Error: failed during run, err: exit status 1
Run failed
```

### `acr` not available

```
# HelloWorld.yaml
version: v1.1.0
steps:
- cmd: acr tag list --registry {{.Run.Registry}} --repository hello-world
```

```
> az acr run --registry mycr --platform windows --file .\HelloWorld.yaml .
Packing source code into tar to upload...
Uploading archived source code from 'C:\Users\mateuszl\AppData\Local\Temp\cli_source_archive_cf0750ff71964c3c902597d7053d673d.tar.gz'...
Sending context (1.779 KiB) to registry: mycr...
Queued a run with ID: db3c
Waiting for an agent...
2022/08/08 15:37:51 Downloading source code...
2022/08/08 15:37:58 Finished downloading source code
2022/08/08 15:38:00 Alias support enabled for version >= 1.1.0, please see https://aka.ms/acr/tasks/task-aliases for more information.
2022/08/08 15:38:00 Creating Docker network: acb_default_network, driver: 'nat'
2022/08/08 15:38:01 Successfully set up Docker network: acb_default_network
2022/08/08 15:38:01 Setting up Docker configuration...
2022/08/08 15:38:11 Successfully set up Docker configuration
2022/08/08 15:38:11 Logging in to registry: mycr.azurecr.io
2022/08/08 15:38:15 Successfully logged into mycr.azurecr.io
2022/08/08 15:38:15 Executing step ID: acb_step_0. Timeout(sec): 600, Working directory: '', Network: 'acb_default_network'
2022/08/08 15:38:15 Launching container with name: acb_step_0
Unable to find image 'acr:latest' locally
docker: Error response from daemon: pull access denied for acr, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.
See 'docker run --help'.
2022/08/08 15:38:19 Container failed during run: acb_step_0. No retries remaining.
failed to run step ID: acb_step_0: exit status 1

Run ID: db3c failed after 31s. Error: failed during run, err: exit status 1
Run failed
```

## Expected behavior

The `bash` echo'ing the expected output.
The `acr tag list` listing available tags.
Both, without failure.

## Any relevant environment information

```
> az version
{
"azure-cli": "2.39.0",
"azure-cli-core": "2.39.0",
"azure-cli-telemetry": "1.0.6",
"extensions": {
"account": "0.2.3"
}
}
```

```
> $PSVersionTable

Name Value
---- -----
PSVersion 7.2.5
PSEdition Core
GitCommitId 7.2.5
OS Microsoft Windows 10.0.19044
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
```

Start by reproducing the two HelloWorld.yaml cases with az acr run --platform windows and compare the alias-support behavior shown in the logs with the documented task aliases. Done means bash executes the echo and acr tag list returns tags without the Docker working-directory or image-pull failures.

Written by the indexing model from the issue text.