az storage fs file list --num-results "*" raises error

**Describe the bug**

Bug similar to #8627

az storage fs file list --num-results "*" raises error
ERROR: argument --num-results: invalid int value: '\*'

"*" should be valid according to [the docs](https://docs.microsoft.com/en-us/cli/azure/storage/file?view=azure-cli-latest#az_storage_file_list)

**Expected behavior**

No error.

**Environment summary**

```bash
az --version
azure-cli 2.30.0

core 2.30.0
telemetry 1.0.6

Python location '/opt/az/bin/python3'
Extensions directory '/home/codas/.azure/cliextensions'

Python (Linux) 3.6.10 (default, Oct 29 2021, 10:11:34)
[GCC 9.3.0]

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```