add(chain): Adds a `network_name` field to `testnet::Parameters` #1031

Job	Run time
Versioning	0s
Build CD Docker / Build images	5m 13s
Test CD custom Docker config file / Test custom-conf in Docker	16s
Test CD testnet Docker config file / Test testnet-conf in Docker	1m 33s
Test CD default Docker config file / Test default-conf in Docker	1m 25s
Deploy ${{ matrix.network }} nodes	0s
Deploy single ${{ inputs.network }} instance	0s
Open or update issues for release failures	0s
	8m 27s

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