vendor: update github.com/tonistiigi/fsutil to 7a889f53dbf6

[crazy-max]

full diff: tonistiigi/fsutil@f098008...7a889f5

[crazy-max]

hum this test with stargz seems to fail quite often: https://github.com/moby/buildkit/actions/runs/8023982875/job/21922689543?pr=4683#step:8:2871

=== FAIL: client TestIntegration/TestStargzLazyInlineCacheImportExport/worker=containerd-snapshotter-stargz (5.09s)
    client_test.go:4646: 
        	Error Trace:	/src/client/client_test.go:4646
        	            				/src/util/testutil/integration/run.go:93
        	            				/src/util/testutil/integration/run.go:207
        	Error:      	Target error should be in err chain:
        	            	expected: "not found"
        	            	in chain: 
        	Test:       	TestIntegration/TestStargzLazyInlineCacheImportExport/worker=containerd-snapshotter-stargz
        	Messages:   	unexpected error <nil> on layer {MediaType:application/vnd.oci.image.layer.v1.tar+gzip Digest:sha256:51d2d8bd60757918ba85b62a1b87d7a61a6483a7d71f9a122e71223d06582379 Size:3422723 URLs:[] Annotations:map[containerd.io/snapshot/stargz

cc @ktock if you have an idea

[crazy-max]

Also fails on master: https://github.com/moby/buildkit/actions/runs/8023290960/job/21919658137#step:8:2910