clang builds now include llvm-symbolizer

[anarthal]

Added the llvm-$VERSION package to clang Docker containers

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.04%. Comparing base (bb568ba) to head (24dc832). Report is 1 commits behind head on develop.

Additional details and impacted files

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