Make tranquilo an optional dependency

[janosg]

• Remove all files related to tranquilo
• Add importing from tranquilo package
• Remove numba as estimagic depedency
  • Make sure it is not used anywhere else in estimagic
• Add Python 3.11 to CI
• Update changelog

[codecov]

Codecov Report

Merging #464 (b23ffcb) into main (dfc968c) will decrease coverage by 0.73%.
The diff coverage is 86.48%.

@@            Coverage Diff             @@
##             main     #464      +/-   ##
==========================================
- Coverage   93.17%   92.44%   -0.73%     
==========================================
  Files         246      192      -54     
  Lines       17937    14591    -3346     
==========================================
- Hits        16712    13489    -3223     
+ Misses       1225     1102     -123     

Impacted Files	Coverage Δ
tests/optimization/test_quadratic_subsolvers.py	100.00% <ø> (ø)
src/estimagic/config.py	75.60% <60.00%> (-2.17%)	⬇️
src/estimagic/optimization/tranquilo.py	88.88% <88.88%> (ø)
src/estimagic/algorithms.py	100.00% <100.00%> (ø)
src/estimagic/benchmarking/run_benchmark.py	92.30% <100.00%> (ø)
src/estimagic/optimization/get_algorithm.py	92.24% <100.00%> (-0.87%)	⬇️
tests/optimization/test_history_collection.py	98.41% <100.00%> (ø)
tests/optimization/test_many_algorithms.py	100.00% <100.00%> (ø)
...ts/optimization/test_with_nonlinear_constraints.py	73.25% <100.00%> (ø)

... and 3 files with indirect coverage changes

[timmens]

Great PR, approved! I only have two minor remarks.