[mlir][ODS] Suppress generated ArrayRef Coverity warning (#220601)

Declarative parsers represent fixed-length operands and types as
ArrayRefs to scalar storage. Coverity loses the explicit length at
resolveOperands calls and reports ARRAY_VS_SINGLETON for the generated
code.

Emit the checker-specific suppression at those generated call sites and
test that it remains in the generated parser.

Found by Coverity.

Assisted-by: Codex
GitOrigin-RevId: 136f049c0f822db05bad4c946dadf3dc112ccd4c