Add support for no_inherit on column level constraints and in create_constraint operation

[kvch]

This PR adds a new option no_inherit to inline and table level check constraints in create_constraint. It also makes sure that the check is duplicated correctly during migration. Also, I added the new attribute noInherit to the output of analyze/read_schema.

[andrew-farries]

Changes look OK, but I think the PR needs to be rebased to pick up relevant changes from main, eg #665.

Table inheritance feels like a very rarely used Postgres feature; did this work arise from seeing it used somwhere like an ORM migration, or for completeness to cover all constraint options? In general, I think we need to be guided more by the former and add features only when we see them in use.

[kvch]

I haven't seen this option in any ORM output yet. I added it for the sake of completeness.
If we are guided by ORM support, then it does not make sense to put more effort into this PR. Do you still want me to finish it and merge it?

[kvch]

I won't close this PR, it comes with some nice cleanups.

[andrew-farries]

Looks good 👍

I think there are changes to sql2pgroll needed too? For example this is supported now right?

pgroll/pkg/sql2pgroll/alter_table_test.go

Line 325 in f3432da

"ALTER TABLE foo ADD CONSTRAINT bar CHECK (age > 0) NO INHERIT",