Fix compile error in Clang

[jaepil]

This PR fixes the following compile errors with Clang:

.../rocksdb/env/fs_on_demand.cc:184:5: error: no member named 'for_each' in namespace 'std'; did you mean 'std::ranges::for_each'?
  184 |     std::for_each(rchildren.begin(), rchildren.end(), [&](std::string& name) {
      |     ^~~~~~~~~~~~~
      |     std::ranges::for_each
/opt/homebrew/opt/llvm@17/bin/../include/c++/v1/__algorithm/ranges_for_each.h:68:23: note: 'std::ranges::for_each' declared here
   68 | inline constexpr auto for_each = __for_each::__fn{};
      |                       ^
.../rocksdb/env/fs_on_demand.cc:188:10: error: no member named 'sort' in namespace 'std'
  188 |     std::sort(result->begin(), result->end());
      |     ~~~~~^
.../rocksdb/env/fs_on_demand.cc:189:10: error: no member named 'sort' in namespace 'std'
  189 |     std::sort(rchildren.begin(), rchildren.end());
      |     ~~~~~^
.../rocksdb/env/fs_on_demand.cc:193:10: error: no member named 'set_union' in namespace 'std'
  193 |     std::set_union(result->begin(), result->end(), rchildren.begin(),
      |     ~~~~~^
.../rocksdb/env/fs_on_demand.cc:221:5: error: no member named 'for_each' in namespace 'std'; did you mean 'std::ranges::for_each'?
  221 |     std::for_each(
      |     ^~~~~~~~~~~~~
      |     std::ranges::for_each
/opt/homebrew/opt/llvm@17/bin/../include/c++/v1/__algorithm/ranges_for_each.h:68:23: note: 'std::ranges::for_each' declared here
   68 | inline constexpr auto for_each = __for_each::__fn{};
      |                       ^
.../rocksdb/env/fs_on_demand.cc:226:10: error: no member named 'sort' in namespace 'std'
  226 |     std::sort(result->begin(), result->end(), file_attr_sorter);
      |     ~~~~~^
.../rocksdb/env/fs_on_demand.cc:227:10: error: no member named 'sort' in namespace 'std'
  227 |     std::sort(rchildren.begin(), rchildren.end(), file_attr_sorter);
      |     ~~~~~^
.../rocksdb/env/fs_on_demand.cc:231:10: error: no member named 'set_union' in namespace 'std'
  231 |     std::set_union(rchildren.begin(), rchildren.end(), result->begin(),
      |     ~~~~~^
8 errors generated.

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@ajkr has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

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@jaepil has updated the pull request. You must reimport the pull request before landing.

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@ajkr has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

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@ajkr merged this pull request in 2cd4346.