Add deployed contracts to utils package

[cedoor]

Description

This PR centralizes the management of the networks and the deployed contracts supported by Semaphore, making it easier to deploy and support new networks. Here the steps:

1. Go to packages/utils and add a new network to the src/networks.ts file
2. Build the package with yarn build
3. Go to packages/contracts and deploy the Semaphore contracts with yarn deploy --network <new-network>
4. Run yarn prettier:write and commit your changes

Additionally, it removes OpenZeppelin Defender, as we cannot use it to deploy contracts due to the free subscription limits. It will be necessary to open another PR to integrate a mechanism to deploy contracts deterministically without Open Zeppelin.

Related Issue(s)

Closes #715

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have run yarn prettier and yarn lint without getting any errors
• [x] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules

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