Support unprotected txs

[mdehoog]

Description

There is a flag for enabling pre-EIP-155 transactions: https://github.com/evmos/ethermint/blob/07cf2bd2b1ce9bdb2e44ec42a39e7239292a14af/server/flags/flags.go#L65

Currently that flag is not read when creating the configuration, which this PR fixes.

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For contributor use:

• [x] Targeted PR against correct branch (see CONTRIBUTING.md)
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work. (minor bug fix)
• [x] Code follows the module structure standards.
• [ ] Wrote unit and integration tests
• [ ] Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• [ ] Added relevant godoc comments.
• [x] Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• [x] Re-reviewed Files changed in the Github PR explorer

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For admin use:

• [ ] Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• [ ] Reviewers assigned
• [ ] Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days-before-close if no further activity occurs.

[mdehoog]

cc @Vvaradinov @MalteHerrmann