Update version to 2.3.0 (bytecodealliance#4171)

- Update version to 2.3.0
- Update RELEASE_NOTES.md. Remove commits that forget to squash when PRs were merged, and some updates on commit messages

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Co-authored-by: James Marsh <[email protected]>
Co-authored-by: [email protected] <[email protected]>
Co-authored-by: TianlongLiang <[email protected]>

Author: 4 people