feat: Add libpython QNX platform support (#3372)

Add libpython QNX platform support.
Note that the qnx py toolchain must come from somewhere else, this
doesn't add an interpreter
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---------

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

Author: lalten

python/private/hermetic_runtime_repo_setup.bzl

@@ -179,17 +179,17 @@ def define_hermetic_runtime_toolchain_impl(
                 "libs/python{major}{minor}t.lib".format(**version_dict),
                 "libs/python3t.lib",
             ],
-            "@platforms//os:linux": [
-                "lib/libpython{major}.{minor}.so".format(**version_dict),
-                "lib/libpython{major}.{minor}.so.1.0".format(**version_dict),
-            ],
             "@platforms//os:macos": ["lib/libpython{major}.{minor}.dylib".format(**version_dict)],
             "@platforms//os:windows": [
                 "python3.dll",
                 "python{major}{minor}.dll".format(**version_dict),
                 "libs/python{major}{minor}.lib".format(**version_dict),
                 "libs/python3.lib",
             ],
+            "//conditions:default": [
+                "lib/libpython{major}.{minor}.so".format(**version_dict),
+                "lib/libpython{major}.{minor}.so.1.0".format(**version_dict),
+            ],
         }),
     )