feat: make sure duplication check happens first in mempool (#4627)

Description
---
Changes the order of validation in mempool to check the excess signature before checking the inputs. 

Motivation and Context
---
When receiving old transactions, if we check the inputs first, the tx will fail on input validation, and we flag this as a transaction that double spends some input. 
This is incorrect as it's a rebroadcast of an old already mined transaction. So we check the kernel_excess signature first, and if this is already contained in the blockchain, we just print out a debug message saying we received an old already mined kernel.

applications/tari_base_node/src/builder.rs

@@ -242,8 +242,8 @@ async fn build_node_context(
             app_config.base_node.bypass_range_proof_verification,
             blockchain_db.clone(),
         )),
-        Box::new(TxInputAndMaturityValidator::new(blockchain_db.clone())),
         Box::new(TxConsensusValidator::new(blockchain_db.clone())),
+        Box::new(TxInputAndMaturityValidator::new(blockchain_db.clone())),
     ]);
     let mempool = Mempool::new(
         app_config.base_node.mempool.clone(),

base_layer/core/src/mempool/mempool_storage.rs

@@ -113,7 +113,10 @@ impl MempoolStorage {
                 Ok(TxStorageResponse::NotStoredConsensus)
             },
             Err(ValidationError::DuplicateKernelError(msg)) => {
-                warn!(target: LOG_TARGET, "Validation failed due to duplicate kernel: {}", msg);
+                debug!(
+                    target: LOG_TARGET,
+                    "Validation failed due to already mined kernel: {}", msg
+                );
                 Ok(TxStorageResponse::NotStoredConsensus)
             },
             Err(e) => {

base_layer/wallet_ffi/build.rs

@@ -25,11 +25,7 @@ fn main() {
             ]),
             ..Default::default()
         },
-        autogen_warning: Some(
-            "// This file was generated by cargo-bindgen. Please do not edit
-    manually."
-                .to_string(),
-        ),
+        autogen_warning: Some("// This file was generated by cargo-bindgen. Please do not edit manually.".to_string()),
         style: Style::Tag,
         cpp_compat: true,
         export: ExportConfig {