fix: TAT-1263 pooled-staking data fails to refresh when on unsupported chainId (MetaMask#6106)

## Explanation

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Currently, when the GNS active chainId isn't supported by pooled-staking
we cannot fetch pooled-staking data. Supported chains are Ethereum
mainnet and Hoodi Testnet.

To fix this, we fallback to Ethereum mainnet when the active chain isn't
supported.
 
### Fixes
- [TAT-1263](https://consensyssoftware.atlassian.net/browse/TAT-1263):
Fix staking data refresh issue when switching accounts in GNS

[TAT-1263]:
https://consensyssoftware.atlassian.net/browse/TAT-1263?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: Matt561

packages/earn-controller/CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- **BREAKING:** Removed `chainId` parameter from `refreshPooledStakingVaultMetadata`, `refreshPooledStakingVaultDailyApys`, `refreshPooledStakingVaultApyAverages`, and `refreshPooledStakes` methods. ([#6106](https://github.com/MetaMask/core/pull/6106))
 - Bump `@metamask/controller-utils` from `^11.10.0` to `^11.11.0` ([#6069](https://github.com/MetaMask/core/pull/6069))
 
 ## [2.0.1]