BUG: Regression in 1.1.0: ValueError when assigning tuple
- [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.

---


#### Code Sample, a copy-pastable example

```python
import pandas as pd
d = pd.DataFrame({'a':[1,1,2,1], 'b':[(1,1,0)]*4})
d.loc[d['a']==1, 'b'] = [[(0, 0, 1)]]
```

```python-traceback
Traceback (most recent call last):
  File "/opt/anaconda3/envs/test/lib/python3.8/site-packages/IPython/core/interactiveshell.py", line 3418, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-7-9e18787827bf>", line 1, in <module>
    d.loc[d['a']==1, 'b'] = [[(0, 0, 1)]]
  File "/opt/anaconda3/envs/test/lib/python3.8/site-packages/pandas/core/indexing.py", line 670, in __setitem__
    iloc._setitem_with_indexer(indexer, value)
  File "/opt/anaconda3/envs/test/lib/python3.8/site-packages/pandas/core/indexing.py", line 1666, in _setitem_with_indexer
    raise ValueError(
ValueError: cannot set using a multi-index selection indexer with a different length than the value
```

And similarly:
```python
import pandas as pd
d = pd.DataFrame({'a':[1,1,2,1], 'b':[(1,1,0)]*4})
ixs = [0,1,3]
vals = [[(0,0,1)]*len(ixs)]
d.loc[ixs,['b']] = vals
```

```python-traceback
Traceback (most recent call last):
  File "/opt/anaconda3/envs/test/lib/python3.8/site-packages/IPython/core/interactiveshell.py", line 3418, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-8-73385df8ecbc>", line 1, in <module>
    d.loc[ixs,['b']] = vals
  File "/opt/anaconda3/envs/test/lib/python3.8/site-packages/pandas/core/indexing.py", line 670, in __setitem__
    iloc._setitem_with_indexer(indexer, value)
  File "/opt/anaconda3/envs/test/lib/python3.8/site-packages/pandas/core/indexing.py", line 1666, in _setitem_with_indexer
    raise ValueError(
ValueError: cannot set using a multi-index selection indexer with a different length than the value
```

Also see related [SO question](https://stackoverflow.com/questions/59922621/set-pandas-dataframe-entries-by-boolean-index-to-tuple-values).
#### Problem description

The code posted above works until pandas version 1.0.5, and fails in 1.1.0. I checked deprecation notes for 1.1.0 and could not identify if this is expected behaviour now.

#### Expected Output

After both assignment operations, `d` should have the following contents:

```
>>> print(d)

   a          b
0  1  (0, 0, 1)
1  1  (0, 0, 1)
2  2  (1, 1, 0)
3  1  (0, 0, 1)
```

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

<details>

INSTALLED VERSIONS
------------------
commit           : db08276bc116c438d3fdee492026f8223584c477
python           : 3.8.5.final.0
python-bits      : 64
OS               : Darwin
OS-release       : 19.6.0
Version          : Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64
machine          : x86_64
processor        : i386
byteorder        : little
LC_ALL           : en_US.UTF-8
LANG             : en_US.UTF-8
LOCALE           : en_US.UTF-8
pandas           : 1.1.3
numpy            : 1.19.4
pytz             : 2020.1
dateutil         : 2.8.1
pip              : 20.2.4
setuptools       : 50.3.0.post20201103
Cython           : None
pytest           : None
hypothesis       : None
sphinx           : None
blosc            : None
feather          : None
xlsxwriter       : None
lxml.etree       : None
html5lib         : None
pymysql          : None
psycopg2         : None
jinja2           : None
IPython          : 7.19.0
pandas_datareader: None
bs4              : None
bottleneck       : None
fsspec           : None
fastparquet      : None
gcsfs            : None
matplotlib       : 3.3.2
numexpr          : None
odfpy            : None
openpyxl         : None
pandas_gbq       : None
pyarrow          : None
pytables         : None
pyxlsb           : None
s3fs             : None
scipy            : 1.5.0
sqlalchemy       : None
tables           : None
tabulate         : 0.8.7
xarray           : None
xlrd             : None
xlwt             : None
numba            : None
</details>
