feat(rust): casting utf8 to temporal

[brayanjuls]

Closes #9994 , closes #10478

The implementation I did in this PR support converting strings to date or datetime, it only support specific formats which are the following:

• %Y-%m-%d
• %Y-%m-%dT%H:%M:%S
• %Y-%m-%dT%H:%M:%S.3f
• %Y-%m-%dT%H:%M:%S%.f%:z

Additionally:

• I found that timestamp casting for time-unit milliseconds and microseconds is not implemented in arrow2 library, so I opened this issue. This is now implemented in nano-arrow crate inside polars.
• Converting date times with the following format "2021-01-01 12:54:58.432" or "2021-01-01 12:54:58" is not supported by nano-arrow cast function, it only supports RFC3339(or a variation of it), should the other formats be supported as well ? if so I think we should open a different issue for that.
• Converting a string number to date is not supported, ie: pl.DataFrame({"x1":["1234"]}).with_columns(**{ "x1-date": pl.col("x1").cast(pl.Date)}), this is why I removed pl.Utf8 from test_from_epoch unit test, should it be supported?

Example

import polars as pl

df = pl.DataFrame({
    "x1": ["2021-01-01"], 
    "x2": ["2021-01-01T12:54:58"],
    "x3": ["2021-01-01T12:54:58.432"],
    "x4": ["2021-01-01T12:54:58.432 +00:00"],
}).with_columns(**{
    "x1-date":pl.col("x1").cast(pl.Date),
    "x2-datetime":pl.col("x2").cast(pl.Datetime),
    "x3-datetime":pl.col("x3").cast(pl.Datetime),
    "x4-datetime-tz":pl.col("x3").cast(pl.Datetime("ms","America/Santiago")),
})

---

For a full history of this PR please refer to the comments in #10517 which was close due to errors while rebasing.

[MarcoGorelli]

The changes themselves look good to me, just not sure about the location of the tests

But test_queries seems like quite a generic file, I'm not totally sure what kinds of tests it's meant to be collecting anyway, so maybe that file needs cleaning up regardless of this PR

Over to @stinodego if you have other comments

EDIT: just added a commit to address the above