Change tests to only execute test 1 and 7

This commit is only to make generating new golden values easier and should *not* be in any pull requests.
Please reject if you're seeing this commit.

Author: AmirhosseinPoolad

.github/workflows/nightly_test_manual.yml

@@ -62,10 +62,5 @@ jobs:
         source .venv/bin/activate
         ./run_reg_test.py -j12 \
             vtr_reg_nightly_test1 \
-            vtr_reg_nightly_test2 \
-            vtr_reg_nightly_test3 \
-            vtr_reg_nightly_test4 \
-            vtr_reg_nightly_test5 \
-            vtr_reg_nightly_test6 \
             vtr_reg_nightly_test7