ci: testplan: do not deal with arch changes

This is generating lots of duplication and unnecessary builds when
multiple arches are being changed. Let's stick to basic coverage which
should be enough for PRs.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

scripts/ci/test_plan.py

@@ -123,7 +123,9 @@ def process(self):
         self.find_tags()
         self.find_tests()
         if not self.platforms:
-            self.find_archs()
+            # disable for now, this is generating lots of churn when changing
+            # architectures that is otherwise covered elsewhere.
+            #self.find_archs()
             self.find_boards()
         else:
             for file in self.modified_files: