Disable integer sanitizer in release function.

EphemeralStorage::release was causing an unsigned integer overflow on
boot due to the way the for loop is constructed. This function doesn't
need to be sanitized. This adds the no_sanitize attribute to the
function.

Bug: 30969751
Test: Compiles and device boots without runtime error.
Change-Id: Id28a2891624c1fe077fa5e27051540a39e33fe71