fix: remove initializer modifier from child contracts

[keyleu]

The initializer modifier is already being used during

    function initialize(
        string memory _name,
        string memory _symbol,
        address _hook,
        address _interchainSecurityModule,
        address _owner
    ) public virtual initializer {

when calling super.initialize. So it's not needed in the child contracts.

This was currently preventing me from deploying using Create3 because it wouldn't allow me to do a 2 step deployment (first deploying the proxy and then initializing it). Since we are setting the owner as msg.sender during initialization:

super.initialize("Noble Dollar", "USDN", hook_, ism_, msg.sender);

when passing the initData to Create3 it would set the owner as the temporary proxy that is created and destroying during the deployment using Create3 (which is some random address, making us lose ownership of the contract), therefore I first deploy without initializing and then initialize it immediately after deployed with the deployer's key. Unfortunately having multiple "initializer" modifiers invalidates initializing in 2 steps because with multiple initializer modifiers in the inheritance chain, 2-step initialization only works during constructor context (address(this).code.length == 0) and we can't do it during constructor context because we want the owner to be msg.sender.

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch keyne/update-initialization-contracts

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