Revert std.math.divCeil for CI tests

lib/std/math.zig

@@ -895,10 +895,24 @@ fn testDivFloor() !void {
 /// infinity. Returns an error on overflow or when denominator is
 /// zero.
 pub fn divCeil(comptime T: type, numerator: T, denominator: T) !T {
+    // TODO: replace with @divCeil
     @setRuntimeSafety(false);
     if (denominator == 0) return error.DivisionByZero;
-    if (@typeInfo(T) == .int and @typeInfo(T).int.signedness == .signed and numerator == minInt(T) and denominator == -1) return error.Overflow;
-    return @divCeil(numerator, denominator);
+    const info = @typeInfo(T);
+    switch (info) {
+        .comptime_float, .float => return @ceil(numerator / denominator),
+        .comptime_int, .int => {
+            if (numerator < 0 and denominator < 0) {
+                if (info == .int and numerator == minInt(T) and denominator == -1)
+                    return error.Overflow;
+                return @divFloor(numerator + 1, denominator) + 1;
+            }
+            if (numerator > 0 and denominator > 0)
+                return @divFloor(numerator - 1, denominator) + 1;
+            return @divTrunc(numerator, denominator);
+        },
+        else => @compileError("divCeil unsupported on " ++ @typeName(T)),
+    }
 }
 
 test divCeil {