Increase minimum supported Rust version (MSRV) to 1.80.1

[findepi]

Which issue does this PR close?

Rationale for this change

We currently require 1.80, but we also say that

If a hotfix is released for the minimum supported Rust version (MSRV),
the MSRV will be the minor version with all hotfixes

therefore we should requite 1.80.1 and thus allow dependencies that
require 1.80.1 (such as substrait)

What changes are included in this PR?

• require 1.80.1 msrv

Are these changes tested?

existing tests

Are there any user-facing changes?

1.80.0 is no longer supported

relates to

• Update substrait requirement from >=0.49.0, <0.49.5 to >=0.49.0, <0.49.6 #13657
• fix: cargo msrv check failed #13654
• Increase minimum supported Rust version (MSRV) to 1.80 #13622

[jonahgao]

Thanks @findepi 👍. We should use version 1.80.1, which includes bug fixes.
Do we also need to update the Dockerfile?

[comphead]

Thanks @findepi
I should probably have made a policy slightly more clear to mention the hotfix related to rust compiler.

#13668

[findepi]

Do we also need to update the Dockerfile?

rust:1.80-bookworm ships rustc 1.80.1