Remove remaining fmt::format use

The only remaining use of the fmt::format library was for something
std::format can't yet handle, printing ranges.  This was only used
twice, in the same file, so just manually build up the vectors in
question into a string and use std::format.  This was already being done
in other places anyway.

Now the fmt::format subproject and dependencies can be completely
removed.

An added benefit is that those two fmt::format calls were failing to
build on my system when I was trying to build using subprojects, and
without them everything works.

Tested:
Can still see the traces, though I only have a 1 element vector to test
with:
    Adding fan target lock of 11300 on fans [fan0] zone 0",

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I90055e9d1c8d0b79b151e1cfd0af2052005cef3c
6 files changed