test: Group tests that can be run only on in CI

2 groups were created:
 - slow: Tests that are very slow because of sleeps, so we can run them all
   in parallel
 - system: Tests that make change to the system, so they can cause problems
   when running in parallel, so we run them in series.

Signed-off-by: Otavio Pontes <otavio.pontes@intel.com>

scripts/github_actions/filter_bats_list.bash

@@ -12,7 +12,7 @@ JOB_NUM=$1
 NUM_JOBS=$2
 DEFAULT_WEIGHT=6
 
-TEST_LIST=$(find test/functional/ -name "*.bats" | sort)
+TEST_LIST=$(find test/functional/ -name "*.bats" \( ! -path "*only_in_ci*" \) | sort)
 
 TOTAL_WEIGHT=0
 for t in $TEST_LIST; do

scripts/github_actions/weight_tests.bash

@@ -2,7 +2,7 @@
 MAX_WEIGHT=40
 
 if [ -z "$1" ]; then
-    TESTS=$(find test/functional/ -name "*.bats")
+    TESTS=$(find test/functional/ -name "*.bats" \( ! -path "*only_in_ci*" \))
 else
     TESTS="$*"
 fi