Misc 2024 edition compatibility fixes (#989)

Some temporary lifetime changes and match restrictions. Found through
#988. Part of #288

Author: smalis-msft

Diff for: flowey/flowey_cli/src/pipeline_resolver/ado_yaml.rs

@@ -267,6 +267,7 @@ echo "$(FLOWEY_TEMP_DIR)/work" | {var_db_insert_working_dir}
 "###
             )
             .trim_start()
+            .to_owned()
         })?;
 
         // import pipeline vars being used by the job into flowey

Diff for: flowey/flowey_cli/src/pipeline_resolver/github_yaml/mod.rs

@@ -337,6 +337,7 @@ echo "{RUNNER_TEMP}/work" | {var_db_insert_working_dir}
 "###
             )
             .trim_start()
+            .to_owned()
         })?;
 
         // import pipeline vars being used by the job into flowey

Diff for: openhcl/underhill_core/src/loader/mod.rs

@@ -541,11 +541,9 @@ pub fn write_uefi_config(
         &platform_config.smbios.chassis_asset_tag,
     );
 
-    cfg.add({
-        &config::NvdimmCount {
-            count: platform_config.general.nvdimm_count,
-            padding: [0; 3],
-        }
+    cfg.add(&config::NvdimmCount {
+        count: platform_config.general.nvdimm_count,
+        padding: [0; 3],
     });
 
     if let Some(instance_guid) = platform_config.general.vpci_instance_filter {

Diff for: support/mesh/mesh_derive/src/lib.rs

@@ -919,7 +919,7 @@ fn derive_enum(
             });
 
             sizes.push(quote! {
-                #variant_destructured_ref => {
+                &mut #variant_destructured_ref => {
                     const NUMBERS: &[u32] = &[#(#field_number,)*];
                     let entries = const { &[#(<#field_encoding as #protobuf_mod::FieldEncode<#field_types, #resource_type>>::ENTRY.erase(),)*] };
                     // SAFETY: the fields are in the same object as `self`.