tree-wide: replace serde_json::from_value(a_value.clone())

`&Value` itself implements `Deserializer` and can therefore
be passed directly to `T::deserialize` without requiring an
intermediate `clone()`. (This also enables optionally
borrowing strings if the result has a short enough lifetime)

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/api2/config/acme.rs

@@ -706,7 +706,7 @@ pub fn update_plugin(
                 bail!("cannot update plugin of type {:?}", ty);
             }
 
-            let mut plugin: DnsPlugin = serde_json::from_value(entry.clone())?;
+            let mut plugin = DnsPlugin::deserialize(&*entry)?;
 
             if let Some(delete) = delete {
                 for delete_prop in delete {