Update version to 28.0.0 and add changelog

[iajoiner]

Which issue does this PR close?

re #3118

Rationale for this change

release

What changes are included in this PR?

Update version to 28.0.0 and add changelog

See rendered changelog here: https://github.com/spaceandtimelabs/arrow-rs/blob/prepare_for_28.0.0/CHANGELOG.md

Are there any user-facing changes?

Update version to 28.0.0 and changelog

[alamb]

Thank you @iajoiner -- I found #3148 is definitely an API change so I confirm 28.0.0 is the right number

[alamb]

I have a few more updates to make, but since I can't push commits to this particular branch, I will make a follow on PR to get the most recent updates

[alamb]

Thanks @iajoiner

[ursabot]

Benchmark runs are scheduled for baseline = 14e6212 and contender = 426a3d4. 426a3d4 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

[iajoiner]

@alamb Oh? Maybe we can use my own personal fork for this purpose from now on if it helps.