Fix arange with dynamic end argument. (#110979)
Fixes https://github.com/pytorch/pytorch/issues/93468
There's a few extra tests that are sort of unrelated, but I ended up writing them while working on the fix and decided to keep them. The big idea here is to split the `_check` so that `expect_true` works; I could have probably also improved the symbolic reasoning but I'm lazy. One small logging fix too.
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/110979
Approved by: https://github.com/Skylion007
