[24.1] Replace Edit button with Import button on WorkflowInvocationHeader

[ahmedhamidawan]

Fixes #18896

Initial implementation with a `Toast`

add_wf_import_btn_to_invocation_view.mp4

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]

Thank you!