test/lang: absorb retired-carrier coverage

local_zeroinit_test.ww takes the 840/944 zero-init seam (dirty-frame
prime and probe share one @test because the runtime forks per test);
alias_cgen_b6, alloc_nested_field, array_static_init, and
strarray_static gain the rows their retired wrappers held; the
remaining files re-point reject-row citations at the r788_* and
stage-matrix fixtures.

test/lang/alias_cgen_b6_test.ww

@@ -169,12 +169,16 @@ type c3es_my32b = c3es_my32;
 };
 
 type c3kw_my32 = u32;
-type c3kw_S = struct { arr: [3]c3kw_my32, n: int };
+type c3kw_my32b = c3kw_my32;
+type c3kw_S = struct { arr: [3]c3kw_my32b, tail: int };
 
 @test fn kw1_101() void = {
-	let s = c3kw_S { arr = [10u32, 20u32, 30u32], n = 4 };
-	assert(s.arr[0] + s.arr[1] + s.arr[2] == 60u32);
-	assert(s.n == 4);
+	let s = c3kw_S { arr = [10u32, 20u32, 30u32], tail = 77 };
+	assert(size(c3kw_my32b) == 4);
+	assert(s.arr[0] == 10u32);
+	assert(s.arr[1] == 20u32);
+	assert(s.arr[2] == 30u32);
+	assert(s.tail == 77);
 };
 
 type c3kc_my16 = u16;