bsp(esp_bsp_devkit): New generic BSP without LCD and touch (BSP-528)

[espzav]

Checklist for new Board Support package or Component

• [x] Component contains License
• [x] Component contains README.md
• ~~[ ] Project README.md updated~~
• [x] Component contains idf_component.yml file with url field defined
• [x] Component was added to CI upload job
• [x] New files were added to CI build job
• [x] New BSP definitions added to bsp_ext.py
• ~~[ ] BSP was added to SquareLine~~
• [x] New BSP supports IDF v4.4.x and later releases
• ~~[ ] Optional: Component contains unit tests~~
• [x] CI passing

Change description

• This is generic BSP without LCD and touch
• I would like to write blog post about generic BSP and I want to mension this too
• Please, check the name of this BSP - is it ok? Or propose another please. (Lite, Simple, etc..)