ci: reuse nextest archive for scale test

[xxchan]

I hereby agree to the terms of the RisingWave Labs, Inc. Contributor License Agreement.

What's changed and what's your intention?

fix #8374

Documentation

• My PR DOES NOT contain user-facing changes.

Click here for Documentation

Types of user-facing changes

Please keep the types that apply to your changes, and remove the others.

• Installation and deployment
• Connector (sources & sinks)
• SQL commands, functions, and operators
• RisingWave cluster configuration changes
• Other (please specify in the release note below)

Release note

[codecov]

Codecov Report

Merging #8431 (e42bd7a) into main (52c868c) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #8431      +/-   ##
==========================================
- Coverage   71.58%   71.57%   -0.01%     
==========================================
  Files        1135     1135              
  Lines      185118   185118              
==========================================
- Hits       132514   132496      -18     
- Misses      52604    52622      +18     

Flag	Coverage Δ
rust	71.57% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/batch/src/executor/group_top_n.rs	68.23% <0.00%> (-6.48%)	⬇️
src/meta/src/hummock/mock_hummock_meta_client.rs	64.43% <0.00%> (-1.04%)	⬇️
src/storage/src/hummock/compactor/mod.rs	80.19% <0.00%> (-0.39%)	⬇️
src/object_store/src/object/mod.rs	47.87% <0.00%> (-0.21%)	⬇️
src/storage/src/hummock/sstable_store.rs	64.35% <0.00%> (-0.16%)	⬇️
src/meta/src/hummock/manager/mod.rs	78.83% <0.00%> (-0.07%)	⬇️

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[BugenZhao]

Look successful to me.