Upgrades Rust to 1.69.0

[brooksprumo]

Upgrade the rust (stable) toolchain to 1.69.0

https://blog.rust-lang.org/2023/04/20/Rust-1.69.0.html

[brooksprumo]

@yihau Can I request updated CI images for this, please? Thanks in advance! 👻

[yihau]

sure thing! I uploaded and the pipeline is green now 🎉

[brooksprumo]

Looks like coverage and stable (among others) were not run by CI since this PR did not change any .rs files.

@yihau Is there a way to force these skipped steps to be run?

Reviewers, sorry for the extra ping. I will re-add you after this is resolved.

[yihau]

ah. I think we should also update here to 1.69.0

solana/ci/docker-rust/Dockerfile

Line 3 in cc6c454

FROM rust:1.68.2

docker files change will trigger everything!

[brooksprumo]

ah. I think we should also update here to 1.69.0

solana/ci/docker-rust/Dockerfile

Line 3 in cc6c454

FROM rust:1.68.2

docker files change will trigger everything!

Ah, thanks for pointing that out; I missed that file. Will do!

[codecov]

Codecov Report

Merging #31336 (d62d765) into master (cece64d) will decrease coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #31336     +/-   ##
=========================================
- Coverage    81.5%    81.5%   -0.1%     
=========================================
  Files         733      733             
  Lines      207071   207071             
=========================================
- Hits       168910   168906      -4     
- Misses      38161    38165      +4     

[ryoqun]

lgtm

hehe, so our nightly is older than stable from now. (upgrading nightly almost is unblocked)

also, fastest rustc bump since the last one #31276, iirc. lol