[Chore][Data] CCS-check must take into account new failure-store delimiter

[thomasneirynck]

When ES starts to implement the new failure store, CCS checks must not validate index-patterns with failure store delimiters.

The check (

kibana/packages/kbn-es-query/src/utils.ts

Line 49 in f86d171

export function isCCSRemoteIndexName(indexExpression: string): boolean {

) should match following change in Elasticsearch (https://github.com/elastic/elasticsearch/pull/118614/files#diff-54b4d10d02244bb6e2b3413b315759f96cc44c6344c59358dabd304dd8def30aR70-R74).

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[thomasneirynck]

Adding blocker-label, since this needs to be done before 8.18.