[Data] Compute Expressions-Expr Rounding

[myandpr]

Description

Completing the Expr (direct) Rounding operations (ceil, floor, round, trunc)

for example:

import ray
from ray.data import from_items
from ray.data.expressions import col

ray.init(include_dashboard=False, ignore_reinit_error=True)
ds = from_items([{"x": 1.1}, {"x": 2.5}, {"x": -3.7}])
for row in ds.iter_rows():
    print(row)

x_expr = col("x")
hasattr(x_expr, "ceil")
ds = ds.with_column("x_ceil", x_expr.ceil())
hasattr(x_expr, "floor")
ds = ds.with_column("x_floor", x_expr.floor())
hasattr(x_expr, "round")
ds = ds.with_column("x_round", x_expr.round())
hasattr(x_expr, "trunc")
ds = ds.with_column("x_trunc", x_expr.trunc())
for row in ds.iter_rows():
    print(row)

Related issues

Related to #58674

Additional information

[myandpr]

Hi, @goutamvenkat-anyscale ,Could you please review this PR when you have time?many thanks

[richardliaw]

hey @myandpr, thanks a bunch for the contribution! if you're interested in chatting more with the contributors, feel free to join our community sync -- https://docs.google.com/forms/d/e/1FAIpQLSeYWjNExnr6gbhO5rpM0i6wm4TBTdsm3y5S0LR8Syzk_2gelQ/viewform

[myandpr]

hey @myandpr, thanks a bunch for the contribution! if you're interested in chatting more with the contributors, feel free to join our community sync -- https://docs.google.com/forms/d/e/1FAIpQLSeYWjNExnr6gbhO5rpM0i6wm4TBTdsm3y5S0LR8Syzk_2gelQ/viewform

@richardliaw Submitted the form! Looking forward to the next sync meeting.Looking forward to contributing more and learning from everyone.

[edoakes]

@bveeramani PTAL

[goutamvenkat-anyscale]

Thanks for your contribution! Just a few comments

[bveeramani]

LGTM other than Goutam's suggestions

[goutamvenkat-anyscale]

lgtm! Thanks