Matter add copy to Path

[s-hadinger]

Description:

Matter, prepare for forthcoming improvements, add copy() to matter.Path() to simplify creating a Path object from a TLV request. No functional change.

Checklist:

• [x] The pull request is done against the latest development branch
• [x] Only relevant files were touched
• [x] 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.2.7.7
• [x] The code change is tested and works with Tasmota core ESP32 V.3.0.1
• [x] I accept the CLA.

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