update Kconfig and esp32_camera.h

[DorBenHarush]

this PR moves the camera configuration fron the file.c to menuconfig. I tested this on my esp32-cam (AI-Thinker) and it works.

[me-no-dev]

Hey :) that file.c is just an example. PINS need to be set in an actual application (like the web server example in ESP-WHO) and not in the driver itself. The driver is just a driver and does not care for the pins as long as they are properly selected in the application.

[DorBenHarush]

Hi, @me-no-dev my point in this pull request is that the pin configuraion can be selected in menuconfig instead of inside the application. Is it possible?
I want to make the pin selection process more eazy for micro-ros

[me-no-dev]

The example I pointed to already has that in menuconfig. Again, it's not the driver that needs it, it's the particular final application 😄 https://github.com/espressif/esp-who/tree/master/examples/single_chip/camera_web_server