osbuild-dev: use sys.exit

For consistency with the rest of the codebase, switch `osbuild-dev` over
to use `sys.exit` instead of `SystemExit`.

tools/osbuild-dev

@@ -11,6 +11,7 @@ import json
 import os
 import secrets
 import subprocess
+import sys
 import tempfile
 from typing import Any, Iterator, Optional
 
@@ -53,10 +54,10 @@ def detect_and_parse_inputs(inputs) -> Iterator[str]:
                 yield value["id"]
         else:
             con.print("[bold][red]Could not understand inputs format[/red][/bold]")
-            raise SystemExit(1)
+            sys.exit(1)
     else:
         con.print("[bold][red]Could not understand inputs format[/red][/bold]")
-        raise SystemExit(1)
+        sys.exit(1)
 
 
 def json_as_terminal_tree(tree: Optional[Tree], data: Any, name: str) -> Tree:
@@ -148,7 +149,7 @@ class Manifest:
                 data = json.load(f)
         except FileNotFoundError:
             con.print(f"[bold][red]Could not open file {path!r}[/red][/bold]")
-            raise SystemExit(1)
+            sys.exit(1)
 
         # We deal with this possibly being a 'wrapped' manifest, one produced
         # by `osbuild-composer`.
@@ -157,7 +158,7 @@ class Manifest:
 
         if data.get("version") != "2":
             con.print(f"[bold][red]Could not parse file {path!r}, wrong manifest version.[/red][/bold]")
-            raise SystemExit(1)
+            sys.exit(1)
 
         return cls(os.path.basename(path), data)