Improved UX of creating TimestampNanosecondArray with timezones

[src255]

Which issue does this PR close?

Closes #3042

What changes are included in this PR?

The with_timezone_utc method is implemented with the timezone "+00:00". Two leading zeros are used for consistency with non-zero offsets. Also, the signature of with_timezone has been changed:

// pub fn with_timezone(&self, timezone: String) -> Self {/* --snip-- */}
pub fn with_timezone(&self, timezone: impl Into<String>) -> Self {/* --snip-- */}

Are there any user-facing changes?

The with_timezone now accepts &str in addition to String. For example,

let arr1: PrimitiveArray<TimestampMillisecondType> =
    TimestampMillisecondArray::from(vec![
        1546214400000,
        -1546214400000,
    ])
//  .with_timezone("+00:00".to_string());
   .with_timezone("+00:00");

let arr2: PrimitiveArray<TimestampMillisecondType> =
    TimestampMillisecondArray::from(vec![
        1546214400000,
        -1546214400000,
    ])
    .with_timezone_utc();

assert_eq!(
    format!("{:?}", arr1),
    format!("{:?}", arr2)
);

[alamb]

Looks great -- thank you @src255

cc @waitingkuo

[alamb]

❤️

[waitingkuo]

Thank you @src255 @alamb

[tustvold]

I took the liberty of resolving the merge conflicts on this

[ursabot]

Benchmark runs are scheduled for baseline = 02a3f5c and contender = 561f63a. 561f63a is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

[src255]

@tustvold Thank you for resolving the merge conflicts, I really appreciate it!

[alamb]

Great team effort 👍