[BUG] Index.intersection throwing error on empty inputs

[galipremsagar]

Describe the bug
When there is an empty list input, Index.intersection is throwing an error.

Steps/Code to reproduce bug

In [1]: import cudf

In [2]: s = cudf.Index(['a', 'b', 'c'], name="abc")

In [5]: s.intersection([])
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Cell In[5], line 1
----> 1 s.intersection([])

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/cudf/core/_base_index.py:643, in BaseIndex.intersection(self, other, sort)
    641 else:
    642     rhs = other
--> 643 result = lhs._intersection(rhs, sort=sort)
    644 result.name = res_name
    645 return result

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/cudf/core/_base_index.py:1330, in BaseIndex._intersection(self, other, sort)
   1328 def _intersection(self, other, sort=None):
   1329     intersection_result = cudf.core.index._index_from_data(
-> 1330         cudf.DataFrame._from_data({"None": self.unique()._column})
   1331         .merge(
   1332             cudf.DataFrame._from_data({"None": other.unique()._column}),
   1333             how="inner",
   1334             on="None",
   1335         )
   1336         ._data
   1337     )
   1339     if sort is None and len(other):
   1340         return intersection_result.sort_values()

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/nvtx/nvtx.py:101, in annotate.__call__.<locals>.inner(*args, **kwargs)
     98 @wraps(func)
     99 def inner(*args, **kwargs):
    100     libnvtx_push_range(self.attributes, self.domain.handle)
--> 101     result = func(*args, **kwargs)
    102     libnvtx_pop_range(self.domain.handle)
    103     return result

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/cudf/core/dataframe.py:3988, in DataFrame.merge(self, right, on, left_on, right_on, left_index, right_index, how, sort, lsuffix, rsuffix, indicator, suffixes)
   3973 elif how in {"leftsemi", "leftanti"}:
   3974     merge_cls = MergeSemi
   3976 return merge_cls(
   3977     lhs,
   3978     rhs,
   3979     on=on,
   3980     left_on=left_on,
   3981     right_on=right_on,
   3982     left_index=left_index,
   3983     right_index=right_index,
   3984     how=how,
   3985     sort=sort,
   3986     indicator=indicator,
   3987     suffixes=suffixes,
-> 3988 ).perform_merge()

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/cudf/core/join/join.py:170, in Merge.perform_merge(self)
    168 lcol = left_key.get(self.lhs)
    169 rcol = right_key.get(self.rhs)
--> 170 lcol_casted, rcol_casted = _match_join_keys(lcol, rcol, self.how)
    171 left_join_cols.append(lcol_casted)
    172 right_join_cols.append(rcol_casted)

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/cudf/core/join/_join_helpers.py:129, in _match_join_keys(lcol, rcol, how)
    126 if how == "left" and rcol.fillna(0).can_cast_safely(ltype):
    127     return lcol, rcol.astype(ltype)
--> 129 return lcol.astype(common_type), rcol.astype(common_type)

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/cudf/core/column/column.py:1021, in ColumnBase.astype(self, dtype, **kwargs)
   1019     return self.as_timedelta_column(dtype, **kwargs)
   1020 else:
-> 1021     return self.as_numerical_column(dtype, **kwargs)

File /nvme/0/pgali/envs/cudfdev/lib/python3.10/site-packages/cudf/core/column/string.py:5652, in StringColumn.as_numerical_column(self, dtype, **kwargs)
   5650 elif out_dtype.kind == "f":
   5651     if not libstrings.is_float(string_col).all():
-> 5652         raise ValueError(
   5653             "Could not convert strings to float "
   5654             "type due to presence of non-floating values."
   5655         )
   5657 result_col = _str_to_numeric_typecast_functions[out_dtype](string_col)
   5658 return result_col

ValueError: Could not convert strings to float type due to presence of non-floating values.

In [6]: s.to_pandas().intersection([])
Out[6]: Index([], dtype='object', name='abc')

Expected behavior

In [6]: s.intersection([])
Out[6]: Index([], dtype='object', name='abc')

Environment overview (please complete the following information)

• Environment location: [Bare-metal]
• Method of cuDF install: [from source]