Add and remove default files spec entries

[tarsius]

• Remove "*.el.in". There are only two packages that benefited from this entry and quite a few more packages that had to undo it.

• Add "lisp/*.el" and corresponding :exclude entries. There are fewer packages that benefit from this change than I would have expected, but still enough to justify this addition.

I have carefully inspected the effect of these changes to determine whether the resulting differences are desired. In the few cases where that was not the case I have adjusted the recipe of the affected package.

See https://github.com/melpa/melpa/pull/8032 for the changes to the recipes.

[tarsius]

@riscy I don't know if you follow this repository. If not, :wave:, please note that the default files spec changed a bit.