Extend linting to expression tools

[bernt-matthias]

Extends #12724 by b35c3b7

For discussion:

• This includes expression tools in the linting. At the moment only the linters in the general module are used.
• Also extends the check for used inputs to expressions. Not sure if its worth the extra import. One might also use it for checking/linting the expression code?

How to test the changes?

(Select all options that apply)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[mvdbeek]

There are better ways to do this (included in #19434), and even more so for expression tools, unused inputs might be there for a reason.

[bernt-matthias]

unused inputs might be there for a reason

Can you give me an example?

There are better ways to do this (included in #19434),

Can you point me where?