Add New Node Flow fixes

.github/workflows/manual-deploy-testnet-validator.yml

@@ -23,10 +23,6 @@ on:
         required: true
         default: 3
         type: number
-      node_private_key:
-        description: 'Node Private Key'
-        required: true
-        type: string
       node_account_address:
         description: 'Node Account Address'
         required: true
@@ -170,7 +166,7 @@ jobs:
                -management_contract_addr=${{ github.event.inputs.MGMT_CONTRACT_ADDR }} \
                -message_bus_contract_addr=${{ github.event.inputs.MSG_BUS_CONTRACT_ADDR }} \
                -l1_start=${{ github.event.inputs.L1_START_HASH }} \
-               -private_key=${{ github.event.inputs.node_private_key }} \
+               -private_key=${{  secrets.ADD_NEW_NODE_PRIVATE_KEY }} \
                -sequencer_id=${{ vars.ACCOUNT_ADDR_NODE_0 }} \
                -host_public_p2p_addr=obscuronode-${{ matrix.host_id }}-${{ github.event.inputs.testnet_type }}-${{ GITHUB.RUN_NUMBER }}.uksouth.cloudapp.azure.com:10000 \
                -host_p2p_port=10000 \