roachtest: use default server.time_after_store_suspect in perturbation

[kvoli]

Previously, server.time_after_store_suspect was set to 10s, down from the default of 30s in perturbation roachtests. It is uncommon for users to alter this cluster setting, let alone decrease it.

Restore the default setting value, 30s.

Part of: https://github.com/cockroachdb/cockroach/issues/132615 Release note: None

[cockroach-teamcity]

This change is 

[kvoli]

TYFTR!

bors r=andrewbaptist,arulajmani

[craig[bot]]

Merge conflict.

[kvoli]

TYFTR!

rebased.

[kvoli]

bors r=arulajmani,andrewbaptist,sumeerbhola

[craig[bot]]

Build succeeded:

• linux_amd64_build
• linux_arm64_build
• check_generated_code
• macos_arm64_build
• lint
• local_roachtest_fips
• examples_orms
• windows_build
• acceptance
• macos_amd64_build
• local_roachtest
• linux_amd64_fips_build
• docker_image_amd64
• unit_tests

[blathers-crl[bot]]

Encountered an error creating backports. Some common things that can go wrong:

1. The backport branch might have already existed.
2. There was a merge conflict.
3. The backport branch contained merge commits.

You might need to create your backport manually using the backport tool.

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error creating merge commit from 37ae20956a4f676503f06dcf752f4cfb82aa90ec to blathers/backport-release-24.3-132759: POST https://api.github.com/repos/cockroachdb/cockroach/merges: 409 Merge conflict []

you may need to manually resolve merge conflicts with the backport tool.

Backport to branch 24.3.x failed. See errors above.

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_{:owl: Hoot! I am a Blathers, a bot for CockroachDB. My owner is dev-inf.}

[kvoli]

blathers backport 24.3