DAOS-16810 test: update fio tests with unique dfuse dir

[daltonbohning]

Update fio tests to use unique dfuse mount directory by letting the framework generate one.

Skip-unit-tests: true
Skip-fault-injection-test: true

Required-githooks: true

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[github-actions]

Ticket title is 'Update fio tests to use a unique dfuse mount dir'
Status is 'In Progress'
https://daosio.atlassian.net/browse/DAOS-16810

[daosbuild1]

Test stage Functional Hardware Large completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-15245/1/execution/node/936/log

[daosbuild1]

Test stage Functional Hardware Large completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-15245/2/execution/node/1025/log

[daosbuild1]

Test stage Functional Hardware Large completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-15245/3/execution/node/855/log

[daosbuild3]

Test stage Functional Hardware Large MD on SSD completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-15245/3/execution/node/976/log

[daosbuild3]

Test stage Functional Hardware Large MD on SSD completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-15245/5/execution/node/837/log