Include tag distance and commit hash in dev versions when possible (#5664)

* Include tag distance and commit hash in dev versions when possible

* Fix test

redbot/_version.py

@@ -0,0 +1,36 @@
+def _get_version(*, ignore_installed: bool = False) -> str:
+    if not __version__.endswith(".dev1"):
+        return __version__
+    try:
+        import os
+        import subprocess
+
+        path = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+        output = subprocess.check_output(
+            ("git", "describe", "--tags", "--long", "--dirty"), cwd=path
+        )
+        _, count, commit, *dirty = output.decode("utf-8").strip().split("-", 3)
+        dirty_suffix = f".{dirty[0]}" if dirty else ""
+        return f"{__version__[:-1]}{count}+{commit}{dirty_suffix}"
+    except Exception:
+        # `ignore_installed` is `True` when building with setuptools.
+        if ignore_installed:
+            # we don't want any failure to raise here but we should print it
+            import traceback
+
+            traceback.print_exc()
+        else:
+            try:
+                from importlib.metadata import version
+
+                return version("Red-DiscordBot")
+            except Exception:
+                # we don't want any failure to raise here but we should print it
+                import traceback
+
+                traceback.print_exc()
+
+    return __version__
+
+
+__version__ = "3.5.0.dev1"