Support hardware keys prompts in Connect

[gzdunek]

Closes #30030 #17311 #34415

This is the last PR for a hardware keys support in Connect.

Since yubikey.go now supports custom prompts, we can pass it a one that shows modals in the Electron app.
The prompts are displayed as important modals. The UX of this is not perfect, since if you have to unlock the hardware key during log-in, you will see a dialog on top of other dialog. Earlier I considered integrating these prompts with a login dialog, but that would require some significant changes on the frontend side (if there’s a login in progress the prompt should be a part of the login dialog, otherwise it should be a standalone dialog). Because of the additional complexity, I kept this out of scope.

TODO: Add hardware keys to the test plan.

Best to review commit-by-commit.

How to test it

1. Build tsh with PIV: PIV=dynamic make build/tsh (same for teleport)
2. Require a hardware key in your role (I set it to hardware_key_touch_and_pin to have all possible prompts).

changelog: Add support for hardware keys in Teleport Connect