Epic: Implement Missing Spark Functions

[sjrusso8]

Description

This issue will be the organizing issue for all the remaining spark functions to method.

Based on the readme here is the list

• aggregate
• ~array_contains~
• ~array_insert~
• ~array_join~
• array_sort
• ~arrays_overlap~
• ~assert_true~
• ~broadcast~
• ~bround~
• ~bucket~
• concat_ws
• ~conv~
• ~corr~
• ~cos~
• ~cosh~
• ~cot~
• ~count~
• count_distinct
• date_format
• date_trunc
• decode
• element_at
• encode
• exists
• filter
• first
• forall
• format_number
• format_string
• from_csv
• from_json
• from_unixtime
• from_utc_timestamp
• get
• get_json_object
• grouping_id
• hypot
• inspect
• instr
• json_tuple
• lag
• last_day
• lead
• levenshtein
• locate
• lpad
• make_date
• map_contains_keys
• map_filter
• map_from_arrays
• map_from_entries
• map_zip_with
• max_by
• min_by
• mode
• months_between
• next_day
• np
• nth_value
• octet_length
• overlay
• overload
• percentile_approx
• pmod
• raise_error
• regexp_extract
• regexp_replace
• repeat
• rpad
• schema_of_csv
• schema_of_json
• sentences
• sequences
• session_window
• sha2
• shiftLeft
• shiftRight
• shiftRightUnsigned
• slice
• sort_array
• split
• substring
• sum_distinct
• sys
• to_degrees
• to_radians
• to_csv
• to_date
• to_json
• to_str
• to_timestamp
• to_utc_timestamp
• transform
• transform_keys
• transform_values
• translate
• trunc
• unix_timestamp
• when
• window
• window_time
• zip_with