wgsl: Migrate AF multiplication tests to use lookup table (gpuweb#3691)

Also converts some of the existing lookup tables to use Map instead of
Record, this allows to having missing key errors appear at the key
lookup, instead of later then the value is trying to be used.

Fixes gpuweb#2993

Author: zoddicus

src/resources/cache/hashes.json

@@ -4710,22 +4710,12 @@ const kMultiplicationInterval64BitsNormalCases = {
     { input: [0.1, -0.1], expected: [reinterpretU16AsF16(0xa120), reinterpretU16AsF16(0xa11e)] },  // ~-0.01
     { input: [-0.1, 0.1], expected: [reinterpretU16AsF16(0xa120), reinterpretU16AsF16(0xa11e)] },  // ~-0.01
   ] as ScalarPairToIntervalCase[],
-  abstract: [
-    // 0.1 isn't exactly representable in f64, but will be quantized to an
-    // exact value when storing to a 'number' (0x3FB999999999999A).
-    // This is why below the expectations are not intervals.
-    // f64 0.1 * 0.1 = 0x3f847ae147ae147c,
-    { input: [0.1, 0.1], expected: reinterpretU64AsF64(0x3f847ae147ae147cn) },  // ~0.01
-    { input: [-0.1, -0.1], expected: reinterpretU64AsF64(0x3f847ae147ae147cn) },  // ~0.01
-    { input: [0.1, -0.1], expected: reinterpretU64AsF64(0xbf847ae147ae147cn) },  // ~-0.01
-    { input: [-0.1, 0.1], expected: reinterpretU64AsF64(0xbf847ae147ae147cn) },  // ~-0.01
-  ] as ScalarPairToIntervalCase[],
 } as const;
 
 g.test('multiplicationInterval')
   .params(u =>
     u
-      .combine('trait', ['f32', 'f16', 'abstract'] as const)
+      .combine('trait', ['f32', 'f16'] as const)
       .beginSubcases()
       .expandWithParams<ScalarPairToIntervalCase>(p => {
         const trait = FP[p.trait];
@@ -7685,26 +7675,12 @@ const kMultiplicationMatrixScalarIntervalCases = {
       ],
     },
   ] as MatrixScalarToMatrixCase[],
-  abstract: [
-    // From https://github.com/gpuweb/cts/issues/3044
-    {
-      matrix: [
-        [kValue.f64.negative.min, 0],
-        [0, 0],
-      ],
-      scalar: kValue.f64.negative.subnormal.min,
-      expected: [
-        [[0, reinterpretU64AsF64(0x400ffffffffffffdn)], 0], // [[0, 3.9999995...], 0],
-        [0, 0],
-      ],
-    },
-  ] as MatrixScalarToMatrixCase[],
 } as const;
 
 g.test('multiplicationMatrixScalarInterval')
   .params(u =>
     u
-      .combine('trait', ['f32', 'f16', 'abstract'] as const)
+      .combine('trait', ['f32', 'f16'] as const)
       .beginSubcases()
       .expandWithParams<MatrixScalarToMatrixCase>(p => {
         const trait = FP[p.trait];