fix: panic when piping "deno help" or "deno --version" (#22917)

Fixes #22863

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

cli/main.rs

@@ -347,7 +347,8 @@ fn resolve_flags_and_init(
       if err.kind() == clap::error::ErrorKind::DisplayHelp
         || err.kind() == clap::error::ErrorKind::DisplayVersion =>
     {
-      err.print().unwrap();
+      // Ignore results to avoid BrokenPipe errors.
+      let _ = err.print();
       std::process::exit(0);
     }
     Err(err) => exit_for_error(AnyError::from(err)),

tests/specs/cli/help_and_version_broken_pipe/__test__.jsonc

@@ -0,0 +1,9 @@
+{
+  "steps": [{
+    "args": "task help",
+    "output": "help.out"
+  }, {
+    "args": "task version",
+    "output": "version.out"
+  }]
+}

tests/specs/cli/help_and_version_broken_pipe/deno.json

@@ -0,0 +1,6 @@
+{
+  "tasks": {
+    "help": "deno help | echo",
+    "version": "deno --version | echo"
+  }
+}

tests/specs/cli/help_and_version_broken_pipe/help.out

@@ -0,0 +1,2 @@
+Task help deno help | echo
+

tests/specs/cli/help_and_version_broken_pipe/version.out

@@ -0,0 +1,2 @@
+Task version deno --version | echo
+