minimize bundle size taken by eth-phishing-detect

Dan M editing on Aug 10:

eth-phishing-detect has huge list of words https://output.circle-artifacts.com/output/job/0b87725e-d9fa-4b1e-87c8-209ba5bb939a/artifacts/0/build-artifacts/source-map-explorer/common-2.html

Two options:
1. Build config.json in a similar way to how we build the locale files, so that it need not be part of the background bundle
2. This can be replaced by regex https://consensys.slack.com/archives/C02DUDT2WTU/p1655939118095499

We should try for 1 first

Start with the source-map-explorer report linked in the issue and compare how locale files are built. Trace where eth-phishing-detect's config.json enters the background bundle, then verify that the chosen approach removes the word list from that bundle and reduces its size.

Written by the indexing model from the issue text.