libcamera: camera_manager: Take camera id in std::string_view

Do not force the caller to have an `std::string` object as a
simple string view is sufficient to do the lookup.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/camera_manager.cpp

@@ -381,7 +381,7 @@ std::vector<std::shared_ptr<Camera>> CameraManager::cameras() const
  *
  * \return Shared pointer to Camera object or nullptr if camera not found
  */
-std::shared_ptr<Camera> CameraManager::get(const std::string &id)
+std::shared_ptr<Camera> CameraManager::get(std::string_view id)
 {
 	Private *const d = _d();