feat: update spot spec with palazzo and colosseo features

[cdummett]

closes #2155

PR aligns specs which touch the Spot product for core changes made in palazzo and colosseo.

It also adds ACs to cover untested components of spot markets.

• 0041-TSTK:
  • New ACs added to ensure target stake calculated correctly in spot markets.
• 0042-LIQF:
  • Spot specific ACs added to ensure marginal cost mechanisms works when new LPs join/leave markets (lower priority as this is extensively tested for future and perpetuals).
  • Spot specific ACs added to ensure fixed fee works.
  • Spot specific ACs added to ensure weighted cost works.
  • Spot specific ACs added to ensure time on book calculated correctly.
  • Spot specific ACs added to ensure fees distributed correctly (lower priority as this is extensively tested for future and perpetuals).
• 0044-LIQM:
  • Spot specific ACs added to ensure liquidity commitments and early exit amendments are calculated correctly.
• 0014-ORDT:
  • Spot specific ACs added for stop orders.