Copy the spark-specific implementation of murmur32 hash from cudf into spark-rapids-jni

[nvdbaranec]

This duplicates the implementation, cpp tests and java tests for the spark-specific murmur32 hash done in cudf by @rwlee. The jni bindings now point to this implementation instead of cudf so in theory we could deprecate what's left in cudf.

One thing I didn't do was trim out the "Spark" name prefixes scattered around the code. Since the code is properly in Spark-land now there's no real need to be so verbose. If people want, I can clean it up.

Includes a small refactoring of the java decimal128 conversion code (see to_java_bigdecimal in hash.cuh) which will also be used by xxhash64.

Dependent on #1244

[jlowe]

Marking this as a draft since it depends upon #1244.

This needs a signoff commit per the contributor guidelines.

[rwlee]

Looks good to me, code is largely identical to the cudf code with minimal refactoring. Only concern is if the to_java_bigdecimal belongs with the decimal utils, but I think that's a nit.

[nvdbaranec]

build

[abellina]

build

[nvdbaranec]

merge