Merge pull request #6405 from ethereum-optimism/refcell/codeowners-update

fix(CODEOWNERS): Update Codeowners Packages and Go Codebases

.github/CODEOWNERS

-# Legacy codebases
+# Packages
+/packages/chain-mon             @ethereum-optimism/devxpod
 /packages/common-ts             @ethereum-optimism/typescript-reviewers
-/packages/contracts             @ethereum-optimism/contract-reviewers
 /packages/contracts-bedrock     @ethereum-optimism/contract-reviewers
 /packages/core-utils            @ethereum-optimism/legacy-reviewers
-/packages/chain-mon             @ethereum-optimism/devxpod
 /packages/replica-healthcheck   @ethereum-optimism/legacy-reviewers
 /packages/sdk                   @ethereum-optimism/devxpod
-/packages/atst                  @ethereum-optimism/devxpod
 
 # Bedrock codebases
 /bedrock-devnet @ethereum-optimism/go-reviewers
 /cannon         @ethereum-optimism/go-reviewers
 /op-batcher     @ethereum-optimism/go-reviewers
+/op-bootnode    @ethereum-optimism/go-reviewers
 /op-chain-ops   @ethereum-optimism/go-reviewers
+/op-challenger  @ethereum-optimism/go-reviewers
 /op-e2e         @ethereum-optimism/go-reviewers
+/op-exporter    @ethereum-optimism/go-reviewers
+/op-heartbeat   @ethereum-optimism/go-reviewers
 /op-node        @ethereum-optimism/go-reviewers
 /op-node/rollup @protolambda @trianglesphere
-/op-proposer    @ethereum-optimism/go-reviewers
-/op-bootnode    @ethereum-optimism/go-reviewers
+/op-preimage    @ethereum-optimism/go-reviewers
 /op-program     @ethereum-optimism/go-reviewers
+/op-proposer    @ethereum-optimism/go-reviewers
 /op-service     @ethereum-optimism/go-reviewers
+/op-signer      @ethereum-optimism/go-reviewers
+/op-wheel       @ethereum-optimism/go-reviewers
 /ops-bedrock    @ethereum-optimism/go-reviewers
 
-
 # Ops
 /.circleci    @ethereum-optimism/infra-reviewers
 /.github      @ethereum-optimism/infra-reviewers