text: Title: [Alerting] disable `any` in the Triggers UI plugin
  Body: When we worked on https://github.com/elastic/kibana/pull/64161 we found that the Triggers UI plugin represented about 50% of our use of `any` and addressing this as part of that PR would have made it far bigger so we decided to move it to it's own follow up issue.
  
  This issue should address that so that we no longer use `any` where ever avoidable and require an explicit comment (disabling the ESLint rule + an explanation) where unavoidable.