Bump to use the flash attention variant (#19505)

Signed-off-by: Rob Suderman <[email protected]>

Author: rsuderman

.github/workflows/pkgci_test_sharktank.yml

@@ -60,7 +60,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           repository: iree-org/iree-test-suites
-          ref: c644a9dfc3e5e1a9d071d5e786b79cf612e9b1d3
+          ref: dab5402da679e713b94a8bd5c400a51cce0e665a
           path: iree-test-suites
           lfs: true
       - name: Install Sharktank models test suite requirements