`heater temperature` should be `preheat temperature`

### 🔍 Before submitting the issue

- [X] I have searched among the existing issues
- [X] I am using a Python virtual environment

### 🐞 Description of the bug

The LPBF and DED simulation wizards in Workbench use the term "Preheat temperature" rather than "Heater Temperature". For consistency `heater_temperature` parameters need to be renamed to `preheat_temperature`.

### 📝 Steps to reproduce

n/a

### 💻 Which operating system are you using?

Windows

### 📀 Which ANSYS version are you using?

24.2

### 🐍 Which Python version are you using?

3.9

### 📦 Installed packages

```shell
n/a
```

Search the repository for heater_temperature and inspect the LPBF and DED simulation wizard entry points and their references. Rename the parameters consistently to preheat_temperature and verify the existing test suite or relevant checks pass with no heater_temperature references remaining.

Written by the indexing model from the issue text.