Bazel Support For stm32 MCU's - Take 2

[garethellis0]

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Description

Opening this PR because I'm pretty sure I totally broke codecov with #937.

• created a bazel toolchain with both clang and arm-none-eabi-gcc
• created a demo project for compiling firmware for frankie_v1 (naming and restructuring of firmware can wait for another PR I think)
• added a script for writing the built firmware to the demo board and debugging it with gdb
• added a script to convert clangs code coverage results into something codecov can understand

Testing Done

Code can build, and be flash and debugged on the stm23h7 demo board

Resolved Issues

Length Justification

Toolchain is massive, demo project is pretty massive (but should require minimal review).

Review Checklist

It is the reviewers responsibility to also make sure every item here has been covered

• Function & Class comments: All function definitions (usually in the .h file) should have a javadoc style comment at the start of them. For examples, see the functions defined in thunderbots/software/geom. Similarly, all classes should have an associated Javadoc comment explaining the purpose of the class.
• Remove all commented out code
• Remove extra print statements: for example, those just used for testing
• Resolve all TODO's: All TODO (or similar) statements should either be completed or associated with a github issue
• Justify drops in code coverage: If this PR results in a non-trivial drop in code coverage (a bot should post a coverage diagram as a comment), please justify why we can't test the code that's not covered.

[codecov]

Codecov Report

Merging #981 into master will increase coverage by 10.16%.
The diff coverage is 84.61%.

@@            Coverage Diff             @@
##           master    #981       +/-   ##
==========================================
+ Coverage   67.24%   77.4%   +10.16%     
==========================================
  Files         263     314       +51     
  Lines        6872   19222    +12350     
==========================================
+ Hits         4621   14879    +10258     
- Misses       2251    4343     +2092

Impacted Files	Coverage Δ
src/software/util/time/duration.cpp	100% <ø> (ø)	⬆️
src/software/ai/hl/stp/stp_test.cpp	97.87% <100%> (ø)
.../backend/input/network/filter/ball_filter_test.cpp	99.36% <50%> (ø)
src/software/geom/circle.h	20% <0%> (-80%)	⬇️
src/software/geom/ray.h	37.5% <0%> (-62.5%)	⬇️
src/software/geom/line.h	50% <0%> (-50%)	⬇️
src/software/geom/voronoi_diagram.h	50% <0%> (-50%)	⬇️
src/software/ai/ai.cpp	0% <0%> (-30.77%)	⬇️
src/software/world/refbox_constants.cpp	54.54% <0%> (-28.79%)	⬇️
src/software/geom/segment.h	71.42% <0%> (-28.58%)	⬇️
... and 387 more

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[garethellis0]

Closing in favor of #985