chore: modernize the codebase using go 1.26 (#278)

This runs:

```
go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix ./...
```

over the codebase, as this is using go 1.26, it can also use the new
new() functionallity so AsPtr and boolPtr is are needed anymore.

Signed-off-by: Miek Gieben <miek@miek.nl>

pkg/api/client.go

@@ -62,6 +62,8 @@ type VolumeClient interface {
 }
 
 // AsPtr returns a pointer to the given value. Useful for optional fields in API structs.
+//
+//go:fix inline
 func AsPtr[T any](v T) *T {
-	return &v
+	return new(v)
 }