pathops coincident work

This is working towards fixing all bugs around simplifying the tiger.

This installment simplifies the point-t intersection list as it is built rather than doing the analysis once the intersections are complete. This avoids getting the list in an inconsistent state and makes coincident checks faster and more stable.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2237223002

TBR=reed@google.com
BUG=skia:5131

Review-Url: https://codereview.chromium.org/2237223002
diff --git a/tests/PathOpsSimplifyTest.cpp b/tests/PathOpsSimplifyTest.cpp
index af2e09d..fe43305 100644
--- a/tests/PathOpsSimplifyTest.cpp
+++ b/tests/PathOpsSimplifyTest.cpp
@@ -5256,7 +5256,7 @@
 #if DEBUG_UNDER_DEVELOPMENT  // tiger
     return;
 #endif
-    uint64_t testlines = 0x0000000202480001;  // best so far: 0x0000001610031021;
+    uint64_t testlines = 0x0000004310528845;  // best so far: 0x0000001d14c14bb1;
     tiger8a_x(reporter, filename, testlines);
 }