Site updates: Regenerate domain certificate when the domain is changed

[youknowriad]

Related STU-19-linear-issue

Proposed Changes

This PR fixes a couple small bugs and makes a small related refactoring:

• Bug 1: When changing the custom domain name for a given site with HTTPs enabled, the certificate is regenerated properly for that site.
• Bug 2: Avoid lingering certificates when sites are removed.
• Refactoring: The logic to updates hosts file and certificates was sometimes implemented in ipc-handlers and sometimes in the server class, this moves all the logic to the server class.

Testing Instructions

• Create a site
• Run the server
• Change custom domain
• Enable/disable HTTPs
• Rename the custom domain

On each step, the site should function properly (assuming the root certificate is trusted)

• Also removing the site, removes the certificate from the file system.

[ivan-ottinger]

The proposed changes look good and work as expected. 👌🏼

• changing and renaming domain works correctly
• disabling HTTPS or removing a site removes the related certificate from the file system
• I did not observe any regressions

[sentry]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ TypeError: Cannot read properties of undefined (reading 'options') T.<anonymous>(main/studio/./src/site-server) View Issue

_{Did you find this useful? React with a 👍 or 👎}