Issue Description

When creating an instance using dscreate, it doesn't enforce max name length.
The ldapi socket name contains name of the instance. If it's too long, we can hit limits, and the file name will be truncated.
Also, it doesn't sanitize the instance name, it's possible to create an instance with non-ascii symbols in its name.

Steps to reproduce

1. dscreate create-template > test.inf
2. Replace instance_name with the name containing emoji or any other non-ascii characters, for example, Cyrillic.
3. Replace instance_name with the name containing >100 characters

Actual results

1. Success
2. The instance is successfully created but fails to start.
3. The socket file name is truncated.

Expected results

1. Success
   2-3. The socket filename length and content are properly validated during dscreate.