Native SPI RGB LED component (#5288)

* Add testing branch to workflow

* Add workflow

* Checkpoint

* Align SPI data rates in c++ code with Python code.

* Checkpoint

* CI fixes

* Update codeowners

* Workflow cleanup

* Rename to spi_rgb_led

* Rename header file

* Clang tidy

* Disable spi after transfer.

* Move enable() to where it belongs

* Call spi_setup before enable

* Clang tidy

* Add test

* Rename to spi_led_strip

* Include 'defines.h'

* Fix CODEOWNERS

* Migrate data rate to new style setting.

* Remove defines.h

* Fix class name

* Fix name in .py

* And more more name tidy up.

---------

Co-authored-by: Keith Burzinski <kbx81x@gmail.com>

tests/test8.yaml

@@ -29,6 +29,12 @@ light:
     name: neopixel-enable
     internal: false
     restore_mode: ALWAYS_OFF
+  - platform: spi_led_strip
+    num_leds: 4
+    color_correct: [80%, 60%, 100%]
+    id: rgb_led
+    name: "RGB LED"
+    data_rate: 8MHz
 
 spi:
   id: spi_id_1