Migrate `balancer.view_pools_tokens_weights` Abstraction

[jacek0x]

Brief comments on the purpose of your changes:

• Migrated the Dune v1 balancer.view_pools_tokens_weights abstraction to a v2 spellbook.
  • The original v1 abstraction is: deprecated-dune-v1-abstractions/ethereum/balancer/view_pools_tokens_weights.sql
  • Gave attribution to original authors of the v1 abstraction

For Dune Engine V2

I've checked that:

General checks:

• [x] I tested the query on dune.com after compiling the model with dbt compile (compiled queries are written to the target directory)
• [x] I used "refs" to reference other models in this repo and "sources" to reference raw or decoded tables
• [x] if adding a new model, I added a test
• [x] the filename is unique and ends with .sql
• [x] each sql file is a select statement and has only one view, table or function defined
• [x] column names are lowercase_snake_cased
• [x] if adding a new model, I edited the dbt project YAML file with new directory path for both models and seeds (if applicable)
• [x] if wanting to expose a model in the UI (Dune data explorer), I added a post-hook in the JINJA config to add metadata (blockchains, sector/project, name and contributor Dune usernames)

Pricing checks:

• [ ] coin_id represents the ID of the coin on coinpaprika.com
• [ ] all the coins are active on coinpaprika.com (please remove inactive ones)

Join logic:

• [x] if joining to base table (i.e. ethereum transactions or traces), I looked to make it an inner join if possible

Incremental logic:

• [ ] I used is_incremental & not is_incremental jinja block filters on both base tables and decoded tables
  • [ ] where block_time >= date_trunc("day", now() - interval '1 week')
• [ ] if joining to base table (i.e. ethereum transactions or traces), I applied join condition where block_time >= date_trunc("day", now() - interval '1 week')
• [ ] if joining to prices view, I applied join condition where minute >= date_trunc("day", now() - interval '1 week')

[mendesfabio]

@hedgehog-jacek can you open this PR to Dune repo? Remember from now to branch off balancer-labs:main and create a feature branch under balancer-labs fork instead of yours. I guess this will help us avoid lots of diffs. Thanks so much!

[jacek0x]

@hedgehog-jacek can you open this PR to Dune repo? Remember from now to branch off balancer-labs:main and create a feature branch under balancer-labs fork instead of yours. I guess this will help us avoid lots of diffs. Thanks so much!

Thanks @mendesfabio, I created the following PR to the Dune repo: https://github.com/duneanalytics/spellbook/pull/2184