Move slow tests to be in repo (#132379)

Move the slow test json to be in the pytorch/pytorch repo and make a job that will update it weekly.  The job uses the same environment as the commit hash.  It uses similar code to the hash updates, but the hash update contains a lot of code that is specific to the hash update, so I chose to pick out the parts that are relevant

Remove references to the old file and set up testing to read from the new file instead

The old update cadence was every day, the new one is every week

The auto slow test infra + the lack of pinning between pytorch and test-infra makes it really hard to tell if a test started failing because of a change or because of the slow test json changing.  While this can have benefits, like disable test issues being effective everywhere immediately, it can also be very confusing, especially since we don't have the same insight into slow tests like we do for disable issues.

Example PR made: https://github.com/pytorch/pytorch/pull/132383 (with all the changes from this PR because it was working on top of this)

We should just get rid of this at some point in favor of the slowTest decorator, but there are some tests that take 5+ minutes to run and I don't want to track them down right now
Pull Request resolved: https://github.com/pytorch/pytorch/pull/132379
Approved by: https://github.com/huydhn

torch/testing/_internal/common_utils.py

@@ -276,7 +276,7 @@ OPINFO_SAMPLE_INPUT_INDEX: Optional[int] = TestEnvironment.def_setting(
 )
 
 DEFAULT_DISABLED_TESTS_FILE = '.pytorch-disabled-tests.json'
-DEFAULT_SLOW_TESTS_FILE = '.pytorch-slow-tests.json'
+DEFAULT_SLOW_TESTS_FILE = 'slow_tests.json'
 
 disabled_tests_dict = {}
 slow_tests_dict = {}