feat: use spot price in multi payment instead of pool trade

[enthusiastmartin]

No description provided.

[github-actions]

Crate versions that have not been updated:

• basilisk-runtime: v27.0.0
• testing-basilisk-runtime: v27.0.0

Crate versions that have been updated:

• pallet-transaction-multi-payment: v6.2.1 -> v6.3.0
• pallet-multi-payment-benchmarking: v5.2.1 -> v5.3.0

Runtime versions don't match.

Runtime version has not been increased.

[codecov]

Codecov Report

Merging #290 (31f81be) into master (6c03e13) will increase coverage by 0.00%.
The diff coverage is 85.00%.

@@           Coverage Diff           @@
##           master     #290   +/-   ##
=======================================
  Coverage   81.90%   81.91%           
=======================================
  Files          21       21           
  Lines        2211     2206    -5     
=======================================
- Hits         1811     1807    -4     
+ Misses        400      399    -1     

Impacted Files	Coverage Δ
pallets/transaction-multi-payment/src/lib.rs	74.16% <83.33%> (-0.24%)	⬇️
.../transaction-multi-payment/benchmarking/src/lib.rs	96.42% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6c03e13...31f81be. Read the comment docs.

[mrq1911]

pallet should be rebenched and benchamrks pallet version bumped