Disable codecov patch check (#7486)

# Description

Disable codecov patch check

## Type of change

- This pull request is a minor refactor, code cleanup, test improvement,
or other maintenance task and doesn't change the functionality of Radius
(issue link optional).

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Fixes: #issue_number

Signed-off-by: Young Bu Park <[email protected]>

.codecov.yml

@@ -11,6 +11,8 @@ coverage:
         informational: true
         target: auto
         threshold: 0%
+    patch:
+      default: false
 
 ignore:
   - "**/mock_*.go"                     # ignore all mock files