bpo-40156: Copy Codecov configuration from master (GH-19306)

Disable "Codevov patch" job on pull requests.

Author: vstinner

.github/codecov.yml

@@ -5,26 +5,20 @@ codecov:
 comment: off
 ignore:
   - "Doc/**/*"
-  - "Misc/*"
+  - "Misc/**/*"
   - "Mac/**/*"
   - "PC/**/*"
   - "PCbuild/**/*"
   - "Tools/**/*"
   - "Grammar/*"
 coverage:
   precision: 2
-  range:
-  - 70.0
-  - 100.0
+  range: 70...90
   round: down
   status:
     changes: off
     project: off
-    patch:
-      default:
-        target: 100%
-        only_pulls: true
-        threshold: 0.05
+    patch: off
 parsers:
   gcov:
     branch_detection: