ci+docker: update toolchain versions to 1.76

[tzemanovic]

to merge before #2687 release

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c733be2) 53.38% compared to head (8988788) 53.37%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2696      +/-   ##
==========================================
- Coverage   53.38%   53.37%   -0.01%     
==========================================
  Files         302      302              
  Lines      103403   103403              
==========================================
- Hits        55198    55194       -4     
- Misses      48205    48209       +4     

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[nick-u410]

@Fraccaman @tzemanovic This broke the docker build in release 0.31.7
clang-tools-11 is problematic on the base image.

root@24bd719a6263:/# apt-get update -qq &&     apt-get install -y --no-install-recommends     build-essential     clang-tools-11     git     libssl-dev     pkg-config     protobuf-compiler     libudev-dev 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package clang-tools-11

You might also consider adding a pipeline for releases that verifies a docker image can be built with the release tag