Bicep deploy: @secure parameters should not be visible (***'d out) from input box

From feedback in #7639, during the deploy flow, the user wants any secure parameters to be starred out as they type it.

Question:
Is there a capability in VS Code to have an Eye icon as you type passwords?

Start by reviewing the feedback in issue #7639 and the Bicep deploy flow, then verify whether VS Code supports password-style input with an eye icon. Done means secure parameters are masked as the user types, with any supported visibility control clarified.

Written by the indexing model from the issue text.