Environment variable support in OutputFileBlobContainerDestination.Path

#### Feature Request Description
Currently, if a JobManagerTask is defined for a CloudJobSchedule with the key name of an EnvironmentSetting in the OutputFileBlobContainerDestination.Path, the key name is not replaced, and the path remains static. See an example below:

```
JobManagerTask = new JobManagerTask($"DATAMANAGER", string.Empty)
{
...
EnvironmentSettings = new List {
new EnvironmentSetting("CURRENT_DATE", "$(date -u +%Y%m%d)")
},
OutputFiles = new List {
new OutputFile("../*.txt",
new OutputFileDestination(new OutputFileBlobContainerDestination(
containerUrl: containerUrl,
path: $"logs/datamanager/$CURRENT_DATE")),
new OutputFileUploadOptions(OutputFileUploadCondition.TaskCompletion)
)
}
}
```

When executed, the logs are uploaded to: logs/datamanager/$CURRENT_DATE

#### Describe Preferred Solution
Support for variables defined in the EnvironmentSettings property to replace placeholders defined in OutputFileBlobContainerDestination.Path.