Fix passing seed parameter to MurmurHash3_32 in cudf::hash() function

[davidwendt]

Description

Fixes passing seed parameter to MurmurHash3_32 in cudf::hash() function. The MurmurHash3_32 algorithm takes a seed value which helps provide variation in hash results. The seed parameter was not being passed to the algorithm through the element_hasher but only used in the hash_combine functions. This resulted in only small variations in the hash results. The following example illustrates:

{
  cudf::test::strings_column_wrapper const strings_col({"hello world"});
  auto const input1 = cudf::table_view({strings_col});
  for (int i = 0; i < 5; ++i) {
    auto output1 = cudf::hash(input1, cudf::hash_id::HASH_MURMUR3, i);
    std::cout << i << ": ";
    cudf::test::print(output1->view());
  }
}

The output for the 5 hashes with associated seed values:

seed hash
0    4241098952
1    4241099017
2    4241099082
3    4241099147
4    4241099213

A MurmurHash3_32 algorithm would produce the following variations if given the seed values:

seed hash
0    1586663183
1    1128525090
2    3382554948
3    1761283998
4    1862001904

This PR passes the seed value through to the internal algorithm. Although the results do not exactly match the standard MurmurHash3_32 the variations are much improved:

seed hash
0    4241098952
1    3782960922
2    1742023551
3    120752660
4    221470638

This variation is important for some machine learning operations.

Some gtests have hardcoded the hash values and were updated to match the new results.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[bdice]

This looks good. Thank you for the fix, and apologies that this slipped past me when writing/reviewing this previously.

[ayushdg]

Can confirm that with this pr, I'm seeing a much larger variation and the results are a lot more in line with what I needed for my use case.

[bdice]

Re-approving (previously draft).

[davidwendt]

/merge