BaseTools/Conf: Align CLANGDWARF and CLANGPDB warning overrides

BaseTools/Conf: Align CLANGDWARF and CLANGPDB warning overrides

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4447

Fix build error related to use of DEBUG_CODE_BEGIN() and
DEBUG_CODE_END(). CLANGPDB requires extra warning disables
for use of DebugLib.h macros.  This change aligns the warning
disables between CLANGDWARF and CLANGPDB.

Cc: Rebecca Cran <rebecca@bsdio.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Yuwei Chen <yuwei.chen@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Rebecca Cran <rebecca@bsdio.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>