Colorize output of stdlib stubtest in CI (#9379)

.github/workflows/daily.yml

@@ -20,6 +20,7 @@ concurrency:
 env:
   PIP_DISABLE_PIP_VERSION_CHECK: 1
   FORCE_COLOR: 1
+  TERM: xterm-256color  # needed for FORCE_COLOR to work on mypy on Ubuntu, see https://github.com/python/mypy/issues/13817
 
 jobs:
   stubtest-stdlib:

.github/workflows/stubtest_stdlib.yml

@@ -17,6 +17,8 @@ permissions:
 
 env:
   PIP_DISABLE_PIP_VERSION_CHECK: 1
+  FORCE_COLOR: 1
+  TERM: xterm-256color  # needed for FORCE_COLOR to work on mypy on Ubuntu, see https://github.com/python/mypy/issues/13817
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}