crimson/osd: drop C++'s ranges to workaround unbuildability on Clang

crimson/osd: drop C++'s ranges to workaround unbuildability on Clang

```
/home/jenkins-build/build/workspace/ceph-pull-requests/src/crimson/osd/osd_operations/snaptrim_event.cc:38:33: note: while checking constraint satisfaction for template 'operator|<const std::ranges::views::_Elements<0> &, const std::vector<std::pair<unsigned long, crimson::interruptible::interruptible_future_detail<crimson::osd::IOInterruptCondition, seastar::future<>>>> &>' required here
    for (const auto &i : subops | std::views::keys) {
                                ^
/home/jenkins-build/build/workspace/ceph-pull-requests/src/crimson/osd/osd_operations/snaptrim_event.cc:38:33: note: in instantiation of function template specialization 'std::ranges::views::__adaptor::operator|<const std::ranges::views::_Elements<0> &, const std::vector<std::pair<unsigned long, crimson::interruptible::interruptible_future_detail<crimson::osd::IOInterruptCondition, seastar::future<>>>> &>' requested here
/usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/iterator_concepts.h:963:7: note: candidate template ignored: constraints not satisfied [with _Tp = std::ranges::ref_view<const std
```

Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>