consul script exception causes values error

- [x] I have searched the [issues](https://github.com/seata/seata/issues) of this repository and believe that this is not a duplicate.

### Ⅰ. Issue Description
consul script exception causes a values error
original:
transport.type=TCP

run consul-config.sh

later:
transport.type=tcp\n


@objcoding PTAL

Start with consul-config.sh and reproduce the reported configuration conversion from transport.type=TCP to transport.type=tcp\n. Trace the script's handling of the value and verify that the completed behavior preserves a valid value without the escaped newline.

Written by the indexing model from the issue text.