Fix accidental Flake8 excludes (pytorch#55178)

Summary:
[Currently](https://github.com/pytorch/pytorch/blob/faa4da49ff6fdde8411572fe907e861e95ce2c85/.flake8#L22), our `.flake8` config file has the `exclude` pattern `scripts`. I'm guessing that this is just meant to exclude the top-level `scripts` dir from Flake8, but it also applies to the following (apparently erroneously):

- `.circleci/scripts`
- `.github/scripts`
- `test/scripts`

This PR corrects the problem by making all the `exclude` patterns (except for the wildcard `*.pyi` pattern) relative to the repository root. Also, since this PR already touches all the `exclude` lines, it also sorts them to help reduce merge conflicts when `.flake8` is edited in the future. This sorting happened to reveal that the `build` pattern was previously present twice, so now it has been deduplicated.

Pull Request resolved: pytorch#55178

Test Plan:
Locally:
```
flake8
```
And also [in CI](https://github.com/pytorch/pytorch/pull/55178/checks?check_run_id=2249949511).

Reviewed By: janeyx99

Differential Revision: D27520412

Pulled By: samestep

fbshipit-source-id: 359275c10ca600ee4ce7906e3a7587ffaa4ae1ed

.circleci/scripts/upload_binary_size_to_scuba.py

@@ -17,7 +17,7 @@ def get_size(file_dir):
         # we should only expect one file, if no, something is wrong
         file_name = glob.glob(os.path.join(file_dir, "*"))[0]
         return os.stat(file_name).st_size
-    except:
+    except Exception:
         logging.exception(f"error getting file from: {file_dir}")
         return 0
 
@@ -145,5 +145,5 @@ def gen_messages():
         if size != 0:
             try:
                 send_message([build_message(size)])
-            except:
+            except Exception:
                 logging.exception("can't send message")

.flake8

@@ -14,20 +14,18 @@ ignore =
     C400,C401,C402,C403,C404,C405,C407,C411,C413,C414,C415
 per-file-ignores = __init__.py: F401 torch/utils/cpp_extension.py: B950
 exclude =
-    docs/src,
-    docs/cpp/src,
-    venv,
-    third_party,
-    caffe2,
-    scripts,
-    docs/caffe2,
-    torch/lib/include,
-    torch/lib/tmp_install,
-    build,
-    torch/include,
-    *.pyi,
-    .git,
-    build,
-    build_test_custom_build,
-    build_code_analyzer,
-    test/generated_type_hints_smoketest.py
+    ./.git,
+    ./build_code_analyzer,
+    ./build_test_custom_build,
+    ./build,
+    ./caffe2,
+    ./docs/caffe2,
+    ./docs/cpp/src,
+    ./docs/src,
+    ./scripts,
+    ./test/generated_type_hints_smoketest.py,
+    ./third_party,
+    ./torch/include,
+    ./torch/lib,
+    ./venv,
+    *.pyi

test/scripts/run_cuda_memcheck.py

@@ -108,7 +108,7 @@ def is_cpu_only(name):
 
     # create a fake progress bar that does not display anything
     class ProgressbarStub:
-        def update(*args):
+        def update(self, *args):
             return
     progressbar = ProgressbarStub()