[Feature request]: Spark version 3.4.0

[eruizalo]

Feature suggestion
Spark 3.4.0 has been released. We should:

• Update sbt to be this version the default version Added spark 3.4 to the project #346
• Update CI Added spark 3.4 to the project #346
• Update docs Added spark 3.4 to the project #346
• Add new type Timestamp without timezone
• Add new sql functions:
  • From functions
    • def mode(e: Column): Column
    • def median(e: Column): Column
    • def window_time(windowColumn: Column): Column
    • def array_append(column: Column, element: Any): Column
    • def get(column: Column, index: Column): Column
    • def array_sort(e: Column, comparator: (Column, Column) => Column): Column feat: [+] #270 array_sort functions working with lambdas #275
    • def array_compact(column: Column): Column
    • def array_insert(arr: Column, pos: Column, value: Column): Column
    • def inline(e: Column): Column
    • def inline_outer(e: Column): Column
    • def unwrap_udt(column: Column): Column
  • From column
    • It seems no new column functions were added
• Close ScalaSteward: Update spark-sql from 3.3.2 to 3.4.0 #344 as "won't do" and relate this PR with the new one

Take a look at #307 or #323 if you need help, as it seems to be very similar

Current behaviour

N/A