fix: Use auto toolchain for go tools (#27)

Use `auto` toolchain for go tools to prevent errors like

```
Run go install honnef.co/go/tools/cmd/staticcheck@latest
go: downloading honnef.co/go/tools v0.7.0
go: honnef.co/go/tools/cmd/staticcheck@latest: honnef.co/go/tools@v0.7.0 requires go >= 1.25.0 (running go 1.24.0; GOTOOLCHAIN=local)
```

Author: maksym-iv-ef

.github/workflows/reusable_go_checks.yml

@@ -101,6 +101,8 @@ jobs:
         with:
           go-version-file: ${{ inputs.go_version_file }}
       - name: Run goimports
+        env:
+          GOTOOLCHAIN: auto
         run: |
           go install golang.org/x/tools/cmd/goimports@latest
           goimports -l -w ./
@@ -117,6 +119,8 @@ jobs:
         with:
           go-version-file: ${{ inputs.go_version_file }}
       - name: Run Staticcheck
+        env:
+          GOTOOLCHAIN: auto
         run: |
           go install honnef.co/go/tools/cmd/staticcheck@latest
           find . -type f -name 'go.mod' | while read -r svc; do