Update `bayesmix` dependencies

[TeoGiane]

Summary

1. Update to boost v.1.84.0 (currently fetching stan-dev/math.git)
2. Update to matplotplusplus v.1.2.1 + improved patch to switch off openCV (otherwise I can not compile on my laptop)

Checks

• [x] Check if now we can compile with clang >= 15 on MacOS operating system
  (this would close #155)

To Do

1. Sync bayesmix-dev/math with upstream repo
2. Fetching bayesmix-dev/math in cmake/math.cmake

[mberaha]

It is working on my laptop

CMAKE_MODULE_PATH /Users/marioberaha/dev/bayesmix_origin
-- The C compiler identification is AppleClang 15.0.0.15000309
-- The CXX compiler identification is AppleClang 15.0.0.15000309
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PkgConfig: /opt/homebrew/bin/pkg-config (found version "0.29.2") 
-- Found OpenMP_C: -Xclang -fopenmp (found version "5.0") 
-- Found OpenMP_CXX: -Xclang -fopenmp (found version "5.0") 
-- Found OpenMP: TRUE (found version "5.0")  
.....

So the clang version is correct.

make run_mcmc produced no error as also ./examples/tutorial/run.sh

I would sync our fork of math and merge this PR