Update workspace / CI to Rust 1.87

[alamb]

Is your feature request related to a problem or challenge?

Rust 1.87 was released today: https://releases.rs/docs/1.87.0/

Describe the solution you'd like

I would like to update the CI tests and checkouts to Rust 1.87

Describe alternatives you've considered

Here is an example of the update to 1.86 from @jsai28 ❤

• Upgrade toolchain to Rust-1.86 #15625

Basically update the rust-toolchain.toml file and then run clippy to get a clean run

Additional context

No response

[alamb]

I think this is pretty straightforward and has a good example to follow

[kadai0308]

Hi @alamb, I'm new here and excited to contribute to the project. Could you please assign the ticket to me? Looking forward to getting started!

[DanielFrantes]

@kadai0308 hi just wrote a comment with only the word "take" here

[kadai0308]

take

[alamb]

Thanks @kadai0308 and @DanielFrantes

[kadai0308]

@alamb
After updating to Rust 1.87, I encountered several warnings such as:

warning: large size difference between variants
   --> datafusion/optimizer/src/simplify_expressions/expr_simplifier.rs:523:1
    |
523 | / enum ConstSimplifyResult {
524 | |     // Expr was simplified and contains the new expression
525 | |     Simplified(ScalarValue),
    | |     ----------------------- the second-largest variant contains at least 64 bytes
...   |
529 | |     SimplifyRuntimeError(DataFusionError, Expr),
    | |     ------------------------------------------- the largest variant contains at least 384 bytes
530 | | }
    | |_^ the entire enum is at least 384 bytes
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
    = note: `#[warn(clippy::large_enum_variant)]` on by default
help: consider boxing the large fields to reduce the total size of the enum
    |
529 -     SimplifyRuntimeError(DataFusionError, Expr),
529 +     SimplifyRuntimeError(DataFusionError, Box<Expr>),

To resolve these warnings, I applied several changes involving the use of Box for large enum variants. This required updating the types across multiple locations in the codebase.

I'm not entirely confident that all the necessary typing changes were done correctly, so I'd appreciate a thorough review of this PR.

Thanks!

[alamb]

Thanks @kadai0308 -- I left some comments on the PR