test(bash-lint): track 'Append Node prompt', 'Append dotnet prompt', and 'ado-aw' in REQUIRED_STEP_DISPLAY_NAMES (#852)

Add three bash-step generators to REQUIRED_STEP_DISPLAY_NAMES that were
previously linted via fixtures but not explicitly tracked:

- 'Append Node prompt' — emitted by src/runtimes/node/extension.rs via
  wrap_prompt_append("Node")
- 'Append dotnet prompt' — emitted by src/runtimes/dotnet/extension.rs via
  wrap_prompt_append("dotnet")
- 'ado-aw' — emitted by src/compile/extensions/ado_aw_marker.rs (metadata
  marker bash step)

Without these entries a silent deletion of any of these three generators
would go undetected by the coverage check.

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

tests/bash_lint_tests.rs

@@ -113,6 +113,9 @@ const REQUIRED_STEP_DISPLAY_NAMES: &[&str] = &[
     "Output copilot version",                 // src/engine.rs (copilot_install_from_nuget + copilot_install_from_github_release)
     "Add copilot to PATH",                    // src/engine.rs copilot_install_from_nuget (1ES path)
     "Resolve ADO organization",               // src/engine.rs copilot_install_from_nuget (1ES, no org)
+    "Append Node prompt",   // src/runtimes/node/extension.rs via wrap_prompt_append("Node")
+    "Append dotnet prompt", // src/runtimes/dotnet/extension.rs via wrap_prompt_append("dotnet")
+    "ado-aw",               // src/compile/extensions/ado_aw_marker.rs metadata marker step
 ];
 
 fn ado_aw_binary() -> PathBuf {