TYP: IntervalIndex.right/left might be infered as function
- [x] I have checked that this issue has not already been reported.

- [x] I have confirmed this bug exists on the latest version of pandas.

- [ ] (optional) I have confirmed this bug exists on the master branch of pandas.

---

```py
import pandas as pd

index: pd.IntervalIndex = pd.IntervalIndex.from_arrays([1], [2])
reveal_type(index)
reveal_type(index.right)
index.right.array
```

pyright
```
info: Type of "index" is "IntervalIndex"
info: Type of "index.right" is "() -> Index"
error: Cannot access member "array" for type "function"
    Member "array" is unknown (reportFunctionMemberAccess)
```

mypy
```
note: Revealed type is 'pandas.core.indexes.interval.IntervalIndex'
note: Revealed type is 'Any'
```

#### Output of ``pd.show_versions()``

<details>

INSTALLED VERSIONS
------------------
commit           : 2cb96529396d93b46abab7bbc73a208e708c642e
python           : 3.9.4.final.0
python-bits      : 64
OS               : Linux
OS-release       : 4.13.0-36-generic
Version          : #40~16.04.1-Ubuntu SMP Fri Feb 16 23:25:58 UTC 2018
machine          : x86_64
processor        : x86_64
byteorder        : little
LC_ALL           : None
LANG             : en_US.UTF-8
LOCALE           : en_US.UTF-8

pandas           : 1.2.4
numpy            : 1.20.3
pytz             : 2021.1
dateutil         : 2.8.1
pip              : 21.0.1
setuptools       : 52.0.0
Cython           : None
pytest           : 6.2.4
hypothesis       : None
sphinx           : None
blosc            : None
feather          : None
xlsxwriter       : None
lxml.etree       : None
html5lib         : None
pymysql          : None
psycopg2         : None
jinja2           : None
IPython          : 7.23.1
pandas_datareader: None
bs4              : None
bottleneck       : None
fsspec           : 2021.05.0
fastparquet      : None
gcsfs            : None
matplotlib       : 3.4.2
numexpr          : 2.7.3
odfpy            : None
openpyxl         : None
pandas_gbq       : None
pyarrow          : None
pyxlsb           : None
s3fs             : None
scipy            : 1.6.3
sqlalchemy       : None
tables           : 3.6.1
tabulate         : None
xarray           : None
xlrd             : None
xlwt             : None
numba            : None

</details>
