UBUNTU: [Config] updateconfigs after AMX patchset

UBUNTU: [Config] updateconfigs after AMX patchset

BugLink: https://bugs.launchpad.net/bugs/1967750
Update configs after applying AMX patchset. Enforce
STRICT_SIGALTSTACK_SIZE as off, because:

CONFIG_STRICT_SIGALTSTACK_SIZE is intend for enforcing strict checking
of the sigaltstack size against the *real size of the FPU frame*,
enabling it is risky since it may lead to the broken of legacy
applications which already allocate a too small sigaltstack but can
still work because they never get a signal delivered. (lin-x-wang)

Fixes: cf1383fe60 ("x86/signal: Implement sigaltstack size validation")
Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>