vector-contract-to-outerproduct-transforms.mlir

[banach-space]

Audit vector-contract-to-outerproduct-transforms.mlir and add tests for scalable vectors.

[banach-space]

• [mlir][vector] Constrain patterns: vector.contract -> vector.outerproduct #68400
• [mlir][SVE] Add an e2e test for vector.contract #69845
• [mlir][Vector] Remove duplicated test cases #70029
• [mlir][vector] Add scalable vectors to tests for vector.contract #70039
• [mlir][SVE] Add more e2e test for vector.contract  #70367
• [mlir][vector] Update v.contract -> v.outerproduct tests (1/N) #70379
• [mlir][Vector] Update v.contract -> v.outerproduct tests (NFC) #70449