message: remove formatting exemption for `test_install`
diff: source .github/bot-base.sh
  EXTENSION_REGEX='\.(cuh?|hpp|hpp\.inc?|cpp)$'
  -FORMAT_HEADER_REGEX='^(benchmark|core|cuda|hip|include/ginkgo/core|omp|reference|dpcpp|common/unified|test/[^t].*|test/t[^e].*)/'
  -FORMAT_REGEX='^(common|examples|test/test_.*)/'
  +FORMAT_HEADER_REGEX='^(benchmark|core|cuda|hip|include/ginkgo/core|omp|reference|dpcpp|common/unified|test)/'
  +FORMAT_REGEX='^(common|examples)/'
  CLANG_FORMAT=clang-format-9
  echo -n "Collecting information on triggering PR"
  