Update CODEOWNERS to individual owners

[peternied]

• Following the guidance from [META] Baseline MAINTAINERS, CODEOWNERS and external collaborator permissions .github#125

traffic-replayer/.github/CODEOWNERS

Lines 1 to 2 in 9e95292

	# This should match the owning team set up in https://github.com/orgs/opensearch-project/teams
	* @opensearch-project/opensearch-migrations

This should be a list of all the maintainers of this project instead of a team.

[peternied]

@wbeckler It looks like you are listed as a maintainer on this project per the Manage access screen and not listed on the maintainers.md file.

[dblock]

Done in #10.