Rework how the logging stack handles rich objects

This makes it possible to render content via rich without a magic string
and relies on a proper mechanism supported by the logging stack.

src/pip/_internal/cli/base_command.py

@@ -181,7 +181,7 @@ class Command(CommandContextMixIn):
                     assert isinstance(status, int)
                     return status
                 except DiagnosticPipError as exc:
-                    logger.error("[present-rich] %s", exc)
+                    logger.error("%s", exc, extra={"rich": True})
                     logger.debug("Exception information:", exc_info=True)
 
                     return ERROR

src/pip/_internal/self_outdated_check.py

@@ -233,7 +233,7 @@ def pip_self_version_check(session: PipSession, options: optparse.Values) -> Non
             ),
         )
         if upgrade_prompt is not None:
-            logger.warning("[present-rich] %s", upgrade_prompt)
+            logger.warning("%s", upgrade_prompt, extra={"rich": True})
     except Exception:
         logger.warning("There was an error checking the latest version of pip.")
         logger.debug("See below for error", exc_info=True)

src/pip/_internal/utils/logging.py

@@ -155,8 +155,8 @@ class RichPipStreamHandler(RichHandler):
 
         # If we are given a diagnostic error to present, present it with indentation.
         assert isinstance(record.args, tuple)
-        if record.msg == "[present-rich] %s" and len(record.args) == 1:
-            rich_renderable = record.args[0]
+        if getattr(record, "rich", False):
+            (rich_renderable,) = record.args
             assert isinstance(
                 rich_renderable, (ConsoleRenderable, RichCast, str)
             ), f"{rich_renderable} is not rich-console-renderable"

src/pip/_internal/utils/subprocess.py

@@ -209,7 +209,7 @@ def call_subprocess(
                 output_lines=all_output if not showing_subprocess else None,
             )
             if log_failed_cmd:
-                subprocess_logger.error("[present-rich] %s", error)
+                subprocess_logger.error("%s", error, extra={"rich": True})
                 subprocess_logger.verbose(
                     "[bold magenta]full command[/]: [blue]%s[/]",
                     escape(format_command_args(cmd)),

tests/unit/test_utils_subprocess.py

@@ -260,9 +260,9 @@ class TestCallSubprocess:
         expected = (
             None,
             [
-                # pytest's caplog overrides th formatter, which means that we
+                # pytest's caplog overrides the formatter, which means that we
                 # won't see the message formatted through our formatters.
-                ("pip.subprocessor", ERROR, "[present-rich]"),
+                ("pip.subprocessor", ERROR, "subprocess error exited with 1"),
             ],
         )
         # The spinner should spin three times in this case since the