fix: allow warn logging to be disabled via RULES_PYTHON_REPO_DEBUG_VERBOSITY (#2737)

Allows the logging level to be set to `FAIL`, removing `WARN` logging.

---------

Co-authored-by: Ignas Anikevicius <240938+aignas@users.noreply.github.com>

Author: mattem

CHANGELOG.md

@@ -78,6 +78,7 @@ Unreleased changes template.
 * (toolchains) Do not try to run `chmod` when downloading non-windows hermetic toolchain
   repositories on Windows. Fixes
   [#2660](https://github.com/bazel-contrib/rules_python/issues/2660).
+* (logging) Allow repo rule logging level to be set to `FAIL` via the `RULES_PYTHON_REPO_DEBUG_VERBOSITY` environment variable.
 * (toolchains) The toolchain matching is has been fixed when writing
   transitions transitioning on the `python_version` flag.
   Fixes [#2685](https://github.com/bazel-contrib/rules_python/issues/2685).

docs/environment-variables.md

@@ -101,6 +101,7 @@ doing. This is mostly useful for development to debug errors.
 Determines the verbosity of logging output for repo rules. Valid values:
 
 * `DEBUG`
+* `FAIL`
 * `INFO`
 * `TRACE`
 :::

python/private/repo_utils.bzl

@@ -56,6 +56,7 @@ def _logger(mrctx, name = None):
 
     verbosity = {
         "DEBUG": 2,
+        "FAIL": -1,
         "INFO": 1,
         "TRACE": 3,
     }.get(verbosity_level, 0)