Make the rename transformation enable/disable the usage of the exclusion list for scalars

[cweckesser]

Is your feature request related to a problem? Please describe.

By default, the rename transform uses an ignore list to skip renaming certain types (built-in types and scalars) in a schema.
If several schemas define the same scalars, they cannot be renamed to avoid collisions because of the usage of this exclusion list (or "ignore list", as named in the implementation).

Describe the solution you'd like

It should be possible to manually enable/disable the usage of the exclusion list via configuration (i.e. a flag) but enforcing its usage by default to keep backwards compatibility.

Describe alternatives you've considered

Additional context