Add Testify Linter (temporalio#8471)

chaptersix · web-flow · commit 6932b0ff7d0b · 2025-10-13T13:03:08.000-05:00
## What changed?
Added a linter for testify.
## Why?
Prevent common testify issues.

Co-authored-by: Alex Stanfield &lt;chaptersix@users.noreply.github.com&gt;
diff --git a/.github/.golangci.yml b/.github/.golangci.yml
@@ -17,6 +17,7 @@ linters:
     - exhaustive
     - godox
     - iotamixing
+    - testifylint
   settings:
     staticcheck:
       checks:
