feat(yield): use pools info from API

[shoom3301]

Summary

cowprotocol/bff#99 - BFF

There are two new endpoints:

• https://bff.barn.cow.fi/42161/yield/getPoolsAverageApr - returns average APR per provider
• https://bff.barn.cow.fi/42161/yield/getPoolsInfo - returns pools info (tvl, apr, etc.)

To Test

1. The values on UI should match values from API
2. Values should be updated after network changes

Important!
If there are some issues with data (you see it on the API response), please report it in slack channel about vampire attack.

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[shoom3301]

@elena-zh the PR is ready for tests

[elena-zh]

Hey @shoom3301 , great!
I've been able to test it on Mainnet only as data is still missing on other chains (reported it here).
Also, provided data differs from the one that is displayed on pool provider's app (also reported)
Issues that I've faced:

1. Some pools are missing in a token list, but they are present on the API response
   

2. Vice versa: pool that are present in a token list, are absent in the API
   
   This is resulting in many 0-data pools on the UI
   

3. There is an issue with decimals: it is weird to see that CoW AMM pool token 0.0% performs better :)
   
   

Thanks!