Take url views by value

Any of our things taking URLs should be taking url_view by value,
similar to how we take string_view.

From the beast documentation:
"...it acts like a string_view in terms of ownership." [1]
Therefore, we should treat it like we treat string_view, and take by value, not reference.

[1] https://www.boost.org/doc/libs/master/libs/url/doc/html/url/ref/boost__urls__url_view.html

Tested:
Stacked these patches.  Redfish service validator passes.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I696b495f4aa04984225853f653cc175c0eaad79d
diff --git a/.clang-tidy b/.clang-tidy
index bad6111..4e09243 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -316,3 +316,4 @@
   - { key: readability-identifier-naming.NamespaceCase, value: lower_case }
   - { key: readability-identifier-naming.StructCase,    value: CamelCase  }
   - { key: cppcoreguidelines-macro-usage.AllowedRegexp, value: DEBUG*|NLOHMANN_JSON_SERIALIZE_ENUM }
+  - { key: performance-unnecessary-value-param.AllowedTypes, value: ((segments_view)|(url_view)) }