Error running SQL DB restore using AZ CLI

### **This is autogenerated. Please review and update as needed.**

## Describe the bug
When running `az backup restore restore-azurewl` the error below occurs.

Initially I run `az backup recoverypoint list` to get a list of recovery points to work with. Then I run `az backup recoveryconfig show` to create a recovery config JSON file before running `az backup restore restore-azurewl` using the JSON file. The issue appears to be related to the JSON file but the formatting appears to be correct as the JSON file appears to validate.

**Command Name**
`az backup restore restore-azurewl`

**Errors:**
```
The command failed with an unexpected error. Here is the traceback:
Expecting value: line 1 column 1 (char 0)
Traceback (most recent call last):
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 233, in invoke
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 663, in execute
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 726, in _run_jobs_serially
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 718, in _run_job
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/_exception_handler.py", line 11, in backup_exception_handler
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 697, in _run_job
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 333, in __call__
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/command_operation.py", line 121, in handler
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/custom_base.py", line 508, in restore_azure_wl
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/custom_wl.py", line 618, in restore_azure_wl
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/custom_help.py", line 448, in get_or_read_json
File "json\__init__.py", line 293, in load
File "json\__init__.py", line 346, in loads
File "json\decoder.py", line 337, in decode
File "json\decoder.py", line 355, in raw_decode
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

```

## To Reproduce:
Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

- _Put any pre-requisite steps here..._

# get list of recovery points to work with
- az backup recoverypoint list --resource-group %resourcegroup% --vault-name %RSVVault% --container-name %container% --item-name "SQLDataBase;mssqlserver;pm" --output table

# build recoveryconfig json file
- az backup recoveryconfig show --restore-mode OriginalWorkloadRestore `
--backup-management-type AzureWorkload `
--container-name %container% `
--item-name "SQLDataBase;mssqlserver;pm" `
--log-point-in-time "27-09-2022-07:32:58" `
--resource-group %resourcegroup% `
--target-container-name %targetcontainer% `
--target-item-name "SQLDataBase;mssqlserver;pm" `
--target-resource-group %resourcegroup% `
--target-server-name %servername%`
--target-server-type SQLDatabase `
--target-vault-name %RSVVault% `
--vault-name %RSVVault% `
--workload-type SQLDataBase `
--output json `
>c:\temp\recoveryconfig.json

# run restore task
- az backup restore restore-azurewl --resource-group {} --vault-name {} --recovery-config recoveryconfig.json

## Expected Behavior

A restore job should be started in Azure RSV.

## Environment Summary
```
Windows-10-10.0.22621-SP0
Python 3.10.5
Installer: MSI

azure-cli 2.40.0
```
## Additional Context

I have been following the docs below;
https://learn.microsoft.com/en-us/azure/backup/backup-azure-sql-restore-cli
https://learn.microsoft.com/en-us/cli/azure/backup/recoveryconfig?view=azure-cli-latest
https://learn.microsoft.com/en-us/cli/azure/backup/restore?view=azure-cli-latest#az-backup-restore-restore-azurewl