Fixed read_json int overflow
- [X] closes #18842
- [X] tests added / passed
- [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

FWIW there are other instances of casting to ``int64`` in the json module which should probably be catching an OverflowError as well, but I did not update them because they were unrelated to the issue brought up. Plan to look at those in more detail for a separate change to determine usage # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/18905?src=pr&el=h1) Report
> Merging [#18905](https://codecov.io/gh/pandas-dev/pandas/pull/18905?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/b9cc8212b69b84ab75a229669b58b207c1c86544?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/18905/graphs/tree.svg?src=pr&token=eZ4WkYLtcO&width=650&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/18905?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #18905      +/-   ##
==========================================
+ Coverage   91.62%   91.62%   +<.01%     
==========================================
  Files         150      150              
  Lines       48939    48939              
==========================================
+ Hits        44838    44840       +2     
+ Misses       4101     4099       -2
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.98% <100%> (ø)` | :arrow_up: |
| #single | `41.14% <0%> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/18905?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/json/json.py](https://codecov.io/gh/pandas-dev/pandas/pull/18905/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2pzb24vanNvbi5weQ==) | `92.56% <100%> (+0.47%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/18905?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/18905?src=pr&el=footer). Last update [b9cc821...cf9f513](https://codecov.io/gh/pandas-dev/pandas/pull/18905?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 looks good. can you add a whatsnew note. ping on green.

happy to have you open / PR other issues you see. No problem. Do you want this in 0.22 or 0.23? everything for 0.23.0 0.22.0 is a special release with only a single breaking change. @jreback all green thanks @WillAyd 

keep em coming!