feat(core): add test::test::get_ipc_response, closes #8199

[vdang-crabnebula]

#8199
Some helper functions added to the tauri::test::MockRuntime that can help to fuzz Tauri applications.

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

[lucasfernog]

We have assert_ipc_response which works in a similar way, maybe we can add a variant to only return the response instead of asserting it. Does it really need to be coupled with app.run and app.run_iteration? Can't that be done on your end?

[vdang-crabnebula]

We have assert_ipc_response which works in a similar way, maybe we can add a variant to only return the response instead of asserting it. Does it really need to be coupled with app.run and app.run_iteration? Can't that be done on your end?

Well you're right, it shouldn't be in the Tauri code. I will do another proposal and move most code into my fuzzing lib