Flaky test failures in Github Actions

[sisuresh]

We've been seeing more failures that look like -

	Process 57498 exited with status = 0 (0x00000000)
4	Process 57498 launched: '/home/runner/work/stellar-core/stellar-core/src/stellar-core' (x86_64)
4	(lldb) bt
local:4/7/100%/22.3s 4	error: invalid thread

Example - https://github.com/stellar/stellar-core/actions/runs/11166730904/job/31041341706

These are the test cases that were being run at the time. It's possible one of those tests isn't setup correctly.

runpart 4 'generate soroban load' 'database is purged at overlay start' 'LedgerTxn loadBestOffer' 'inflation total coins' 'CKMSSample gamma distribution'