Fix for balancer.bpt_prices

[viniabussafi]

Thank you for contributing to Spellbook 🪄

Contribution type

Please check the type of contribution this pull request is for:

• [ ] New spell(s)
• [x] Adding to existing spell lineage
• [ ] Bug fix

For adding to existing spell lineage

If you are adding to an existing spell lineage, please provide the following information:

• Description: This PR removes a few of complexity behind the balancer bpt prices calculation. In the trades based calculation part, a few calculations were simplified, as well as references to prices.usd were changed, since it was already being called in a previous CTE.

[dune-eng]

Workflow run id 9679535447 approved.

[dune-eng]

Workflow run id 9679535678 approved.

[dune-eng]

Workflow run id 9679879401 approved.

[dune-eng]

Workflow run id 9679879796 approved.

[dune-eng]

Workflow run id 9680000542 approved.

[dune-eng]

Workflow run id 9680000875 approved.

[dune-eng]

Workflow run id 9680145102 approved.

[dune-eng]

Workflow run id 9680145407 approved.

[dune-eng]

Workflow run id 9680534029 approved.

[dune-eng]

Workflow run id 9680534338 approved.

[dune-eng]

Workflow run id 9680719555 approved.

[dune-eng]

Workflow run id 9680719829 approved.

[dune-eng]

Workflow run id 9680819698 approved.

[dune-eng]

Workflow run id 9680820045 approved.

[dune-eng]

Workflow run id 9680903151 approved.

[dune-eng]

Workflow run id 9680903512 approved.

[dune-eng]

Workflow run id 9681157863 approved.

[dune-eng]

Workflow run id 9681158308 approved.