fix: Restart server on blockHost configuration change

[meisster]

• Closes Changes to blockHosts config value should trigger restart #22634

User facing changelog

Cypress will now restart on changes to blockHosts configuration entry. Fixes #22634

Additional details

Changes to blockHosts configuration entry should trigger a restart and result in new values being properly loaded.

Steps to test

Launch cypress, modify blockHosts entry, wait for cypress to restart and see if new values are used.

How has the user experience changed?

Can now change blockHosts entry without the need to manually rerun cypress.

PR Tasks

• Have tests been added/updated?
• Has the original issue (or this PR, if no issue exists) been tagged with a release in ZenHub? (user-facing changes only)
• Has a PR for user-facing changes been opened in cypress-documentation?
• Have API changes been updated in the type definitions?

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