Refactor transaction payment (#1864)

* Reuse pallet-transaction-payment from Substrate, split our ChargeTransactionPayment code out.

* Use improved transaction priority calculation from Substrate.

* Implement support for disable fees.

* Add benchmark of ChargeTransactionPayment tx extension.

* Benchmark ChargeTransactionPayment extension.

* Return the extension weight.

* Use git paths instead of version for Substrate deps.

* Update to Substrate release polkadot-stable2512.

* Fix tests build.

Author: Neopallium

.maintain/frame-weight-template.hbs

@@ -48,10 +48,10 @@ impl {{pallet}}::WeightInfo for SubstrateWeight {
         {{~#if (not c.is_used)}}_{{/if}}{{c.name}}: u32, {{/each~}}
     ) -> Weight {
         // Minimum execution time: {{underscore benchmark.min_execution_time}} nanoseconds.
-        Weight::from_ref_time({{underscore benchmark.base_weight}})
+        Weight::from_parts({{underscore benchmark.base_weight}}, 0)
             {{#each benchmark.component_weight as |cw|}}
             // Standard Error: {{underscore cw.error}}
-            .saturating_add(Weight::from_ref_time({{underscore cw.slope}}).saturating_mul({{cw.name}}.into()))
+            .saturating_add(Weight::from_parts({{underscore cw.slope}}, 0).saturating_mul({{cw.name}}.into()))
             {{/each}}
             {{#if (ne benchmark.base_reads "0")}}
             .saturating_add(DbWeight::get().reads({{benchmark.base_reads}}))