ns for fx: reenable tests disabled by #62608
Summary:
In https://github.com/pytorch/pytorch/pull/62608 various tests in FX NS
were disabled due to lack of dtype inference.
https://github.com/pytorch/pytorch/pull/75471 fixes some of these issues,
the issue fixed by this PR is probably why the tests were disabled.
This PR reenables the tests and adjusts them for the new behavior in
https://github.com/pytorch/pytorch/pull/62608.
Test plan:
```
python test/test_quantization.py -k NumericSuite
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75511
Approved by: https://github.com/jerryzh168
