lazy date_range doesn't respect time zone

[MarcoGorelli]

Polars version checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of Polars.

Issue description

The following outputs

shape: (3, 4)
┌──────┬─────────────────────┬─────────────────────┬───────────────────────────────────┐
│ name ┆ from                ┆ to                  ┆ date_range                        │
│ ---  ┆ ---                 ┆ ---                 ┆ ---                               │
│ str  ┆ datetime[μs]        ┆ datetime[μs]        ┆ list[datetime[μs]]                │
╞══════╪═════════════════════╪═════════════════════╪═══════════════════════════════════╡
│ A    ┆ 2020-01-01 00:00:00 ┆ 2020-01-02 00:00:00 ┆ [2020-01-01 00:00:00, 2020-01-02… │
│ B    ┆ 2020-01-02 00:00:00 ┆ 2020-01-03 00:00:00 ┆ [2020-01-02 00:00:00, 2020-01-03… │
│ C    ┆ 2020-01-03 00:00:00 ┆ 2020-01-04 00:00:00 ┆ [2020-01-03 00:00:00, 2020-01-04… │
└──────┴─────────────────────┴─────────────────────┴───────────────────────────────────┘

Reproducible example

df = pl.DataFrame(
    {
        "name": ["A", "B", "C"],
        "from": [datetime(2020, 1, 1), datetime(2020, 1, 2), datetime(2020, 1, 3)],
        "to": [datetime(2020, 1, 2), datetime(2020, 1, 3), datetime(2020, 1, 4)],
    }
)
print(
    df.with_columns(
        pl.date_range(
            start=pl.col("from"),
            end=pl.col("to"),
            interval="1d",
            lazy=True,
            time_zone="Asia/Kathmandu",
        ).alias("date_range")
    )
)

Expected behavior

shape: (3, 4)
┌──────┬─────────────────────┬─────────────────────┬────────────────────────────────────┐
│ name ┆ from                ┆ to                  ┆ date_range                         │
│ ---  ┆ ---                 ┆ ---                 ┆ ---                                │
│ str  ┆ datetime[μs]        ┆ datetime[μs]        ┆ list[datetime[μs, Asia/Kathmandu]] │
╞══════╪═════════════════════╪═════════════════════╪════════════════════════════════════╡
│ A    ┆ 2020-01-01 00:00:00 ┆ 2020-01-02 00:00:00 ┆ [2020-01-01 00:00:00 +0545, 2020…  │
│ B    ┆ 2020-01-02 00:00:00 ┆ 2020-01-03 00:00:00 ┆ [2020-01-02 000:00:00 +0545, 2020…  │
│ C    ┆ 2020-01-03 00:00:00 ┆ 2020-01-04 00:00:00 ┆ [2020-01-03 00:00:00 +0545, 2020…  │
└──────┴─────────

Installed versions

---Version info---
Polars: 0.17.8
Index type: UInt32
Platform: Linux-5.10.102.1-microsoft-standard-WSL2-x86_64-with-glibc2.35
Python: 3.8.16 (default, Dec  7 2022, 01:12:06)
[GCC 11.3.0]
---Optional dependencies---
numpy: 1.24.2
pandas: 1.5.3
pyarrow: 11.0.0
connectorx: <not installed>
deltalake: <not installed>
fsspec: <not installed>
matplotlib: 3.6.2
xlsx2csv: <not installed>
xlsxwriter: <not installed>