Enhance DX8 texture and surface null/error checks

[seer-by-sentry]

Fixes CLIENT-34G. The issue was that: D3DXLoadSurfaceFromSurface receives NULL surface pointer because GetSurfaceLevel's return value is unchecked, leading to access violation.

• Added null checks for the input 'surface' parameter in '_Create_DX8_Texture'.
• Implemented checks for successful texture creation after calling '_Create_DX8_Texture'.
• Added error handling and null checks for 'GetSurfaceLevel' calls in '_Create_DX8_Texture' and 'MissingTexture::_Init'.
• Improved the robustness of Direct3D texture and surface operations by logging errors and returning a missing texture on failure.

This fix was generated by Seer in Sentry, triggered automatically. 👁️ Run ID: 9159096

Not quite right? Click here to continue debugging with Seer.