* CI: add build job for latest Ubuntu * source * source env * scons cache * cache pyenv * fix key * source old-commit-hash: fbd98b0e541b89f477061bab34dfc41495ac9399
* CI: add build job for latest Ubuntu * source * source env * scons cache * cache pyenv * fix key * source old-commit-hash: fbd98b0e541b89f477061bab34dfc41495ac9399