Added Github workflow for continuous deployment of contracts to Neutron testnet

[dusan-maksimovic]

Description

This PR does the following:

• Adds GH workflow that deploys the latest version of SCs to the Neutron testnet each time we merge something into main. This workflow will also run the script to create ICQs for top 5 validators and run ICQ relayer to get the results into the Hydro smart contract.
• Adds tools/deployment/setup_on_mainnet.sh script for easier deployment of SCs on the Neutron mainnet
• Removes e2e tests from the tests GH workflow since they only instantiate the contracts, and the same thing is done by the newly created GH workflow.

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Author Checklist

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I have...

• Targeted the correct branch
• Included the necessary unit tests
• Added/adjusted the necessary interchain tests
• Added a changelog entry in .changelog
• Compiled the contracts by using make compile and included content of the artifacts directory into the PR
• Regenerated front-end schema by using make schema and included generated files into the PR
• Updated the relevant documentation or specification
• Reviewed "Files changed" and left comments if necessary
• Confirmed all CI checks have passed