Select is interactive when placed in disabled fieldset

### Issue type

**I'm submitting a ...** (check one with "x")

* [X] bug report
* [ ] feature request

### Issue description

**Current behavior:**
Select control is interactive when placed inside `` tag

**Expected behavior:**
Select behaves in the same when placed inside `` tag, as when the control is explicitly disabled.

**Steps to reproduce:**
Use following snippet and try to interact with the control:
```


Option empty
Option 0
Option 1
Option 2
Option 3
Option 4


```

### Other information:
Angular v.15
Nebular v.10