FIx violations and enable --warn=all (#30854)

* --warn=all

* setoption default warn=all

* to old test yaml

* cleanup

* advanced cscanner

* SCons conditional scanner

* not time  yet

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Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

SConstruct

@@ -9,6 +9,9 @@ import SCons.Errors
 
 SCons.Warnings.warningAsException(True)
 
+# pending upstream fix - https://github.com/SCons/scons/issues/4461
+#SetOption('warn', 'all')
+
 TICI = os.path.isfile('/TICI')
 AGNOS = TICI