Unknown pytest.mark.test_properties - is this a typo

### Description

I receive the following warning on using add_test_properties in our project with a custom pyproject.toml file for docs(...)

### Analysis results

`PytestUnknownMarkWarning: Unknown pytest.mark.test_properties - is this a typo `

### Solution

Using [pytest_configure](https://docs.pytest.org/en/stable/reference/reference.html#pytest.hookspec.pytest_configure)

### Error Occurrence Rate

None

### How to reproduce

_No response_

### Supporting Information

_No response_

### Classification

Minor

### First Affected Release

not released (main)

### Last Affected Release

not released (main)

### Expected Fixed Release

before release (main)

### Category

- [ ] Safety Relevant
- [ ] Security Relevant

Start by tracing add_test_properties and the custom pyproject.toml configuration, then compare how pytest_configure registers markers. Confirm the warning no longer appears when running the project's pytest invocation with that configuration; the issue names no reproduction test or source file.

Written by the indexing model from the issue text.