scripted-diff: Rename max_sane_feerate to client_maxfeerate

-BEGIN VERIFY SCRIPT-
git grep -l 'max_sane_feerate' | xargs sed -i 's/max_sane_feerate/client_maxfeerate/g'
-END VERIFY SCRIPT-

src/test/fuzz/tx_pool.cpp

@@ -291,7 +291,7 @@ FUZZ_TARGET(tx_pool_standard, .init = initialize_tx_pool)
         // Make sure ProcessNewPackage on one transaction works.
         // The result is not guaranteed to be the same as what is returned by ATMP.
         const auto result_package = WITH_LOCK(::cs_main,
-                                    return ProcessNewPackage(chainstate, tx_pool, {tx}, true, /*max_sane_feerate=*/{}));
+                                    return ProcessNewPackage(chainstate, tx_pool, {tx}, true, /*client_maxfeerate=*/{}));
         // If something went wrong due to a package-specific policy, it might not return a
         // validation result for the transaction.
         if (result_package.m_state.GetResult() != PackageValidationResult::PCKG_POLICY) {