fix(builder): Error passthrough on rpc errors

[FuzzB0t]

Any errors that happen while trying to communicate with the RPC during read operations on optimism were being skipped, which is why the fallback registry would try mainnet even though it may result in fetching the wrong package info.

Adding a throw statement resulted in the RPC error being thrown when a read operation fails due to an RPC issue.

fixes https://linear.app/usecannon/issue/CAN-470/differentiate-errors-better-on-the-fallback-registry

Examples:

Package only on Ethereum mainnet throws rpc error if there is one:
https://www.loom.com/share/bfea17e267f4436395dcdac94e2afd9d

Package only on Ethereum mainnet throws rpc error if there is one:
https://www.loom.com/share/393264be32cd44bcbb499e800521d0aa

Package on both networks does not fall back to eth mainnet if theres an rpc error:
https://www.loom.com/share/e064960836264851aa8ffe63f1ab3dd2

Ive confirmed that all the packages are resolved correctly and the fallback behaviour now works ONLY if the package is not found (aka returns empty string)

[changeset-bot]

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Latest commit: 6a0c083

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