use std::format instead of fmt::format

The std::format is sufficient for the uses in this repository except
for in one file (override_fan_target.cpp, since P2286 isn't supported
by GCC yet).  Switch to std::format whenever possible.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ib2576fb530a4d7ce238e1b0bd95b40b476ec2107
diff --git a/monitor/power_interface.cpp b/monitor/power_interface.cpp
index f6589b8..dbfcfda 100644
--- a/monitor/power_interface.cpp
+++ b/monitor/power_interface.cpp
@@ -49,7 +49,7 @@
     catch (const std::exception& e)
     {
         getLogger().log(
-            fmt::format("Caught exception while creating BMC dump: {}",
+            std::format("Caught exception while creating BMC dump: {}",
                         e.what()),
             Logger::error);
     }