Specify nrext64 option when creating XFS filesystem #4354

Job	Run time
stratis-cli-checks	9m 14s
checks_with_tang (TANG_URL=tang RUST_LOG=stratisd=debug make -f Makefile test-clevis-loop, 1.74.0...	13m 41s
checks (make -f Makefile fmt-ci, 1.74.0, rustfmt)	1m 1s
python-based-tests	2m 39s
checks (make -f Makefile check-typos, 1.74.0, cargo)	1m 48s
shell-checks	39s
stratis-min-cli-checks	2m 27s
tests-with-testing-repo (HEAD)	21m 36s
tests-with-testing-repo (v3.6.0)	21m 37s
	1h 14m 42s

Provide feedback