Move where appropriate

Clang-tidy-18 has new checks that can find more cases where we've
missed an opportunity to std::move.

Fix them.

Tested: Logging works, unit tests pass.

Change-Id: I0cf58204ce7265828693b787a7b3a16484c3d5e5
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/.clang-tidy b/.clang-tidy
index ca103f3..5b530c3 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -357,4 +357,5 @@
   - { key: readability-identifier-naming.FunctionIgnoredRegexp,  value: (BMCWEB_LOG_DEBUG|BMCWEB_LOG_INFO|BMCWEB_LOG_WARNING|BMCWEB_LOG_ERROR|BMCWEB_LOG_CRITICAL) }
   - { key: cppcoreguidelines-macro-usage.AllowedRegexp, value: DEBUG*|NLOHMANN_JSON_SERIALIZE_ENUM }
   - { key: performance-unnecessary-value-param.AllowedTypes, value: ((segments_view)|(url_view)) }
+  - { key: cppcoreguidelines-rvalue-reference-param-not-moved.IgnoreUnnamedParams, value: true }
   - { key: misc-include-cleaner.IgnoreHeaders, value: ((nlohmann/json_fwd.hpp)|(boost/.*/src.hpp)|(boost/.*/detail/.*)|(nlohmann/detail/.*)|(stdio.h)|(ranges)|(bits/chrono.h)|(boost/system/error_code.hpp)) }