[link components] make isDomainSecure configurable

[chandlerprall]

Right now isDomainSecure is hard coded to flag elastic.co & subdomains as secure for the purpose of adding rel=noreferrer to non-elastic links.

Instead of the hard-coded value, this should be configurable by the application; likely by adding a function to EuiProvider that can provide this true/false logic, defaulting to () => false and we'll re-add the elastic.co logic to Kibana's use of that provider

[github-actions]

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[github-actions]

❌ We're automatically closing this issue due to lack of activity. Please comment if you feel this was done in error.

[cee-chen]

Noting for historical recordkeeping: this was actually closed/resolved by #6535 (removing isDOmainSecure entirely).