Git askpass (#25953)

Supersedes #25848

Release Notes:

- git: Supporting push/pull/fetch when remote requires auth

---------

Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>

crates/git_ui/Cargo.toml

@@ -18,6 +18,7 @@ test-support = ["multi_buffer/test-support"]
 
 [dependencies]
 anyhow.workspace = true
+askpass.workspace= true
 buffer_diff.workspace = true
 collections.workspace = true
 component.workspace = true