Berry change internal storage of parent class for methods

[s-hadinger]

Description:

First phase of adding the possibility to share a method between multiple class, which overcomes the lack of multiple inheritance.

In this first phase, the parent class is added to bproto in a rarely used ptab/nproto used to store sub-functions. When solidifying, the original class name (i.e. the class name of the original class where the method was first implemented) is added as prefix.

No functional change.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.6
• The code change is tested and works with Tasmota core ESP32 V.3.0.0
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass