gcc15: Update to c++23 and ignore some errors Tested: Build locally and works - platform11: http://fusion2/3ff2006d-9c03-3f0c-99fd-bcefc6aaca1f - platform11: http://fusion2/982d88b5-28f9-38ef-a3a2-d824b919c13c - platform5: http://fusion2/a7e89bcd-86a0-33b2-8f33-2bb24ef3afb5 - platform15: http://fusion2/e56dcb19-6dcd-35a0-b5ee-30740fbf27df - platform17: http://fusion2/d0e6af61-eb95-3a70-a6a3-d1bdab987ea2 - platform18: http://fusion2/cda6ba3a-58f5-3907-b584-04786b9fe634 - platform25: http://fusion2/714cc620-6f0a-3bfd-90dd-95356b62b54b Google-Bug-Id: 482144905 Change-Id: I3cb00f9235a98f88ad8b391d4d374f57693f336a Signed-off-by: Willy Tu <wltu@google.com>