Pipeline for running optional firecracker integration tests

fix(vmm/persist): do not close uffd socket

Failed in 16m 26s
:pipeline:
❓ m6i.metal al2023 linux_6.1./tools/devtool -y test --performance -c 1-10 -m 0 -- integration_tests/ -m 'no_block_pr and not nonci' --log-cli-level=INFO
Waited 3m 27s
·
Ran in 11m 1s
❓ m6a.metal al2 linux_5.10./tools/devtool -y test --performance -c 1-10 -m 0 -- integration_tests/ -m 'no_block_pr and not nonci' --log-cli-level=INFO
Waited 56s
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Ran in 10m 37s
❓ m7a.metal-48xl al2 linux_5.10./tools/devtool -y test --performance -c 1-10 -m 0 -- integration_tests/ -m 'no_block_pr and not nonci' --log-cli-level=INFO
Waited 1m 12s
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Ran in 10m 19s
Total Job Run Time: 2h 46m