feat(spark): add spark random functions

[cht42]

Which issue does this PR close?

• Closes [datafusion-spark] implement spark random functions #19907
• Part of [EPIC] Complete datafusion-spark Spark Compatible Functions #15914

Rationale for this change

Implement spark random functions:

• https://spark.apache.org/docs/latest/api/sql/index.html#uniform
• https://spark.apache.org/docs/latest/api/sql/index.html#random
• https://spark.apache.org/docs/latest/api/sql/index.html#rand
• https://spark.apache.org/docs/latest/api/sql/index.html#randn

What changes are included in this PR?

New spark random functions

Are these changes tested?

yes in slt

Are there any user-facing changes?

yes

[cht42]

for reference the spark random functions are implemented here https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/randomExpressions.scala