cli: retry template clone with sanitized gitconfig

[godnight10061]

Fixes #3319

dx new uses cargo-generate/libgit2 to clone templates. If a user has url.*.insteadOf rewrites in their global git config (e.g. rewriting https://github.com/ to an SSH/custom host), libgit2 can fail with class=Os/timeouts and dx would not hit the sanitized gitconfig retry.

This change makes the sanitized retry apply to any cargo-generate clone failure (using cargo-generate's common wrapper error), and treats cargo-generate panics as retryable.

Tests:

• cargo fmt --all -- --check
• cargo clippy --workspace --exclude dioxus-desktop --examples --tests --all-features --all-targets -- -D warnings
• NDK_HOME=C:\\dummy-ndk cargo test --workspace --tests
• cargo test --doc --workspace --all-features
• manual: target\\release\\dx.exe new with url.insteadOf rewriting file:/// -> ssh://[email protected]:1/