ASan build option in tor-browser-build is broken

Trying to do a ASan build for #27531 (moved) results in build breakage due to --enable-tests and --enable-debug. In the first case we get

55:51.29 /var/tmp/build/firefox-124fa904c4b2/mfbt/tests/TestWrappingOperations.cpp:27:1: error: non-constant condition for static assertion
55:51.29  static_assert(WrapToSigned(uint8_t(128)) == -128,
55:51.29  ^~~~~~~~~~~~~
55:51.29 /var/tmp/build/firefox-124fa904c4b2/mfbt/tests/TestWrappingOperations.cpp:27:27:   in constexpr expansion of 'mozilla::WrapToSigned<unsigned char>(128)'
55:51.29 /var/tmp/build/firefox-124fa904c4b2/obj-x86_64-pc-linux-gnu/dist/include/mozilla/WrappingOperations.h:89:59:   in constexpr expansion of 'mozilla::detail::WrapToSignedHelper<UnsignedType>::compute<unsigned char>(((int)aValue))'

and similar errors. Disabling tests results in packaging errors

 0:01.00 /usr/bin/make -j4 -s stage-package
 0:01.71 Error: /var/tmp/build/firefox-124fa904c4b2/browser/installer/package-manifest.in:201: Missing file(s): bin/components/dom_bindings_test.xpt
 0:01.75 Error: /var/tmp/build/firefox-124fa904c4b2/browser/installer/package-manifest.in:246: Missing file(s): bin/components/layout_debug.xpt