Update module path and streamline Go testing workflow

Changed the module path in `go.mod` for test modules and removed unnecessary indirect dependencies in `go.sum`. Also improved the GitHub Action workflow by explicitly navigating to the tests directory before running `go test ./...`.

.github/workflows/go.yml

@@ -25,4 +25,5 @@ jobs:
             ${{ runner.os }}-go-
       - name: Get dependencies, run test
         run: |
-          go test ./tests/...
+          cd tests
+          go test ./...

tests/go.mod

@@ -1,4 +1,4 @@
-module tests
+module gorm.io/plugin/optimisticlock/tests
 
 go 1.18
 
@@ -15,6 +15,4 @@ require (
 	golang.org/x/text v0.14.0 // indirect
 )
 
-replace (
-	gorm.io/plugin/optimisticlock  => ../
-)
+replace gorm.io/plugin/optimisticlock => ../

tests/go.sum

@@ -10,5 +10,3 @@ gorm.io/driver/sqlite v1.5.6 h1:fO/X46qn5NUEEOZtnjJRWRzZMe8nqJiQ9E+0hi+hKQE=
 gorm.io/driver/sqlite v1.5.6/go.mod h1:U+J8craQU6Fzkcvu8oLeAQmi50TkwPEhHDEjQZXDah4=
 gorm.io/gorm v1.25.11 h1:/Wfyg1B/je1hnDx3sMkX+gAlxrlZpn6X0BXRlwXlvHg=
 gorm.io/gorm v1.25.11/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=
-gorm.io/plugin/optimisticlock v1.1.3 h1:uFK8zz+Ln6ju3vGkTd1LY3xR2VBmMxjdU12KBb58PBA=
-gorm.io/plugin/optimisticlock v1.1.3/go.mod h1:S+MH7qnHGQHxDBc9phjgN+DpNPn/qESd1q69fA3dtkg=