[winlogbeat] lowercase and despace/dehyphen all field names before processing

**Describe the problem**

Windows logs fields with various diverging field names:

```
IPAddress
IpAddress
Ipaddress
ipAdress
```

```
Win32 Error
win32Error
Win32Error
```

```
Powershell-ID
PowershellID
```
are all real field names that result in separate fields in Elasticsearch.

**Describe the enhancement:**

lowercase all field names and remove spaces (" ") and hyphens ("-") befor processing them. This should significantly cut down on issues with duplicate fields that defy standardization.

**Describe a specific use case for the enhancement or feature:**
Be able to work with more uniform field names.

**Describe drawbacks**
This would be a breaking change that would need refactoring of user dashboards.

See also #48876 #13416