Update workspace to use Rust 1.88

[alamb]

Is your feature request related to a problem or challenge?

Rust 1.88 was released last week https://blog.rust-lang.org/2025/06/26/Rust-1.88.0/

We should update DataFusion to use the latest rust,

Describe the solution you'd like

Follow the instructions here about how to upgrade

datafusion/docs/source/contributor-guide/howtos.md

Line 22 in 8a6e98d

## How to update the version of Rust used in CI tests

Describe alternatives you've considered

No response

Additional context

No response

[alamb]

Here is an example

• Upgrade toolchain to Rust-1.86 #15625
• More details here: Upgrade toolchain to Rust 1.86 #15619

[melroy12]

take