fix(nextest): override timeout for slow ci tests

[rymnc]

Linked Issues/PRs

• A lot of PRs fail due to this test being slow only in the CI environment, could be due to disk bandwidth on the runners

Description

• Adds an override to nextest.toml for the specific test that often times out

Checklist

• Breaking changes are clearly marked as such in the PR description and changelog
• New behavior is reflected in tests
• The specification matches the implemented behavior (link update PR if changes are needed)

Before requesting review

• I have reviewed the code myself
• I have created follow-up issues caused by this PR and linked them here

After merging, notify other teams

[Add or remove entries as needed]

• Rust SDK
• Sway compiler
• Platform documentation (for out-of-organization contributors, the person merging the PR will do this)
• Someone else?

[rymnc]

regression detected in #2469, master is OK