We noticed that two fixes are required so the mozJS backport builds cleanly on 8.0:

1. fmt compatibility issue

Problem: the fmt version shipped in the 8.0 tree does not provide fmt::format_string; it exposes fmt::string_view instead.

Proposed fix: add a small compatibility macro used by LoggingInterface.h to map a single name to the appropriate fmt type for the configured fmt version (use fmt::format_string when available; fall back to fmt::string_view for 8.0). 

2. Explicitly include Utility.h

Problem: commit [5cfbc09|https://github.com/10gen/mongo/commit/5abd171fa9d539578d5f1d3d4417a4ca4606c078] changed include ordering on some files in master; 8.0 does not reflect that ordering, which causes compilation issues where StringBuffer.h relies implicitly on includes moved elsewhere.

Proposed fix: explicitly include Utility.h in StringBuffer.h in the 8.0 tree so the header is self-contained (matches master behavior and prevents build fragility).