ci: don't self-update rustup when using the rust-version script

[yihau]

Problem

we have some issues with Windows pipelines when setting up Rust version.
context: https://discord.com/channels/428295358100013066/560503042458517505/1237118149510566011

I found an issue in rustup repo: rust-lang/rustup#3709

I think it's harmless to adopt the workaround as our standard process. (even a better idea )

Summary of Changes

add --no-self-update to rust-version

the successful build: https://github.com/anza-xyz/agave/actions/runs/8979866592/job/24662583658?pr=1209

[mergify]

Backports to the stable branch are to be avoided unless absolutely necessary for fixing bugs, security issues, and perf regressions. Changes intended for backport should be structured such that a minimum effective diff can be committed separately from any refactoring, plumbing, cleanup, etc that are not strictly necessary to achieve the goal. Any of the latter should go only into master and ride the normal stabilization schedule.

[mergify]

Backports to the beta branch are to be avoided unless absolutely necessary for fixing bugs, security issues, and perf regressions. Changes intended for backport should be structured such that a minimum effective diff can be committed separately from any refactoring, plumbing, cleanup, etc that are not strictly necessary to achieve the goal. Any of the latter should go only into master and ride the normal stabilization schedule. Exceptions include CI/metrics changes, CLI improvements and documentation updates on a case by case basis.

[CriesofCarrots]

🪖

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.1%. Comparing base (3f6c567) to head (4b8f069).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #1209     +/-   ##
=========================================
- Coverage    82.1%    82.1%   -0.1%     
=========================================
  Files         886      886             
  Lines      236443   236443             
=========================================
- Hits       194299   194287     -12     
- Misses      42144    42156     +12