Attempting to add an entity type with too long machine name breaks the site

Committed a fix that sets a max length on the machine name form field. This however does not prevent against creating an entity with a machine name that's too long in code. I will therefore leave this issue open until a proper fix has been committed.

Attached patch adds validation to the EckEntityType class to ensure the machine name is below 27 characters.

The reason for 27 characters is because of the fact that there are 5 characters needed for the bundle machine name which consits of entity machine name + '_type'

Still needs work because the original fix limits machine names to 32 which still allows for things to go wrong. Additional tests are needed for the form as well.

Add attribution for Deeson

Closing this as a duplicate of #2975136: WSOD by creating types: Limit of 32 chars exceeded when creating machine name ID with too much characters which has a test covered patch that's in review.