Exclude ci checks and tests from building boards

tools/ci_set_matrix.py

@@ -34,6 +34,11 @@ PORT_TO_ARCH = {
     "stm": "arm",
 }
 
+IGNORE = [
+    "tools/ci_set_matrix.py",
+    "tools/ci_check_duplicate_usb_vid_pid.py",
+]
+
 changed_files = {}
 try:
     changed_files = json.loads(os.environ["CHANGED_FILES"])
@@ -80,6 +85,14 @@ def set_boards_to_build(build_all):
                 if port != "unix":
                     boards_to_build.update(port_to_boards[port])
                 continue
+            
+            # Check the ignore list to see if the file isn't used on board builds.
+            if p in IGNORE:
+                continue
+                
+            # Boards don't run tests so ignore those as well.
+            if p.startswith("tests"):
+                continue
 
             # Otherwise build it all
             boards_to_build = all_board_ids