Deprecate cudf::hashing::spark_murmurhash3_x86_32 (#15074)

The `cudf::hashing::spark_murmurhash3_x86_32()` function was moved to the Spark plugin since it had common code with the Spark implementation of `xxhash_64` (also implemented in the plugin).
This change deprecates the API and the generic `cudf::hashing::hash()` function to be removed in a follow-on release.

Reference hash cleanup issue: #13706

Authors:
  - David Wendt (https://github.com/davidwendt)

Approvers:
  - Bradley Dice (https://github.com/bdice)
  - Karthikeyan (https://github.com/karthikeyann)

URL: #15074

cpp/include/cudf/hashing.hpp

@@ -63,7 +63,7 @@ static constexpr uint32_t DEFAULT_HASH_SEED = 0;
  *
  * @returns A column where each row is the hash of a column from the input
  */
-std::unique_ptr<column> hash(
+[[deprecated]] std::unique_ptr<column> hash(
   table_view const& input,
   hash_id hash_function               = hash_id::HASH_MURMUR3,
   uint32_t seed                       = DEFAULT_HASH_SEED,
@@ -115,6 +115,8 @@ std::unique_ptr<table> murmurhash3_x64_128(
 /**
  * @brief Computes the MurmurHash3 32-bit hash value of each row in the given table
  *
+ * @deprecated Since 24.04
+ *
  * This function computes the hash similar to MurmurHash3_x86_32 with special processing
  * to match Spark's implementation results.
  *
@@ -125,7 +127,7 @@ std::unique_ptr<table> murmurhash3_x64_128(
  *
  * @returns A column where each row is the hash of a row from the input
  */
-std::unique_ptr<column> spark_murmurhash3_x86_32(
+[[deprecated]] std::unique_ptr<column> spark_murmurhash3_x86_32(
   table_view const& input,
   uint32_t seed                       = DEFAULT_HASH_SEED,
   rmm::cuda_stream_view stream        = cudf::get_default_stream(),

cpp/tests/CMakeLists.txt

@@ -175,7 +175,6 @@ ConfigureTest(
   hashing/sha256_test.cpp
   hashing/sha384_test.cpp
   hashing/sha512_test.cpp
-  hashing/spark_murmurhash3_x86_32_test.cpp
   hashing/xxhash_64_test.cpp
 )