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fix the create azure file pvc failure if there is no storage account in current resource group

**What this PR does / why we need it**:
When create an azure file PVC, there will be error if there is no storage account in current resource group.
With this PR, a storage account will be created if there is no storage account in current resource group.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #56556

**Special notes for your reviewer**:
1. rephrase the code logic of `CreateFileShare` func.
```
if accountName is empty, then 
    find a storage account that matches accountType
    if no storage account found, then
        create a new account
else
    we only use user specified storage account

create a file share according to found storage account
```
2. Use func `getStorageAccountName` to get a unique storage account name by UUID, a storage account for azure file would be like `f0b2b0bd40c010112e897fa`. And in next PR, I will use this function to create storage account for azure disk, the storage account for azure disk would be like `d8f3ad8ad92000f1e1e88bd`.

**Release note**:

```
fix the create azure file pvc failure if there is no storage account in current resource group
```
/sig azure
/assign @rootfs