Remove TODO and rename messageValidator to messageInterceptor

[RayXpub]

• Replaces CCIPConfigTypes.ConfigState /// TODO: explain rollbacks? by rollbacks comment
• Renames messageValidator to messageInterceptor in ramps

[github-actions[bot]]

LCOV of commit 14765a3 during Solidity Foundry #8151

Summary coverage rate:
  lines......: 97.6% (2195 of 2248 lines)
  functions..: 94.5% (411 of 435 functions)
  branches...: 93.4% (524 of 561 branches)

Files changed coverage rate: n/a

[cl-sonarqube-production[bot]]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube