Naming consistent with agnostic.py and sys.implementation.name

diff --git a/python/testing/implementation/mcp/__init__.py b/python/testing/implementation/micropython/__init__.py
similarity index 100%
rename from python/testing/implementation/mcp/__init__.py
rename to python/testing/implementation/micropython/__init__.py

diff --git a/python/testing/implementation/mcp/digitalio.py b/python/testing/implementation/micropython/digitalio.py
similarity index 100%
rename from python/testing/implementation/mcp/digitalio.py
rename to python/testing/implementation/micropython/digitalio.py