Fix deprecation issues with older Python code

[multiplemonomials]

Summary of changes

As @JohnK1987 discovered, the Mbed OS Python packages currently have some issues with newer python versions, in particular Python 3.12 and 3.13. 3.12 removed a number of legacy packages, such as imp, pkg_resources, and optparse. For the most part, the mbed_tools package (being developed only a few years ago), is free of these issues, but the older python packages (which are mainly used for running tests) had a fair amount of issues that needed to be fixed.

With the changes in this PR, I am now able to run all the Python tests successfully using Python 3.13!

As part of this, I also ended up removing the mbed-greentea package. It had several of its own deprecation issues, and it seems to be entirely composed of either legacy names for stuff in mbed_os_tools.test or exact duplicates of files & tests from that package.

Impact of changes

Python scripts no longer error our on Python >= 3.12

Migration actions required

Documentation

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Pull request type

[X] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[] No Tests required for this change (E.g docs only update)
[X] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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[JohnK1987]

@multiplemonomials any ideas?

[main] Building folder: MbedCE_H5_NEw
[build] Starting build
[proc] Executing command: "C:\Program Files\CMake\bin\cmake.EXE" --build c:/MbedCE/MbedCE_H5_NEw/build --config Debug --target flash-main --
[build] [1/1 100% :: 0.965] C:\Windows\system32\cmd.exe /C "cd /D C:\MbedCE\MbedCE_H5_NEw\mbed-os\tools\python && C:\MbedCE\MbedCE_H5_NEw\mbed-os\venv\Scripts\python.exe -m install_bin_file C:/MbedCE/MbedCE_H5_NEw/build/main.bin NUCLEO_H503RB 115200"
[build] FAILED: CMakeFiles/flash-main C:/MbedCE/MbedCE_H5_NEw/build/CMakeFiles/flash-main
[build] C:\Windows\system32\cmd.exe /C "cd /D C:\MbedCE\MbedCE_H5_NEw\mbed-os\tools\python && C:\MbedCE\MbedCE_H5_NEw\mbed-os\venv\Scripts\python.exe -m install_bin_file C:/MbedCE/MbedCE_H5_NEw/build/main.bin NUCLEO_H503RB 115200"
[build] [1720215923.59][mbedls.lstools_base]daplink entry: "0832" not found in platform database
[build] [install-bin-file] ERROR: The target board you compiled for is not connected to your system.
[build] Please reconnect it and retry the last command.
[build] (Searched for any NUCLEO_H503RB board.)
[build] ---
[build] ninja: build stopped: subcommand failed.
[proc] The command: "C:\Program Files\CMake\bin\cmake.EXE" --build c:/MbedCE/MbedCE_H5_NEw/build --config Debug --target flash-main -- exited with code: 1
[driver] Build completed: 00:00:01.010
[build] Build finished with exit code 1

[multiplemonomials]

Hmm, I think this is an issue with the "detect code" of the Nucleo H5 board not being known to Mbed, not anything to do with Python deprecation. Taking a look, you might need to update the DEFAULT_PLATFORM_DB dict in mbed-os/tools/python/mbed_os_tools/detect/platform_database.py

[JohnK1987]

Aha, I did not know about this database. I fill the numbers and it is OK now.