[TASK] Remove Substrate Wallet Connections in Tangle Dapp and Tangle Cloud

## Description
- We no longer allow user to connect any Substrate wallet to our dapps. 
- To do it, need to update the code of `tangle-dapp`, `tangle-cloud` and any libs related to wallet connections.
- Remove all "EVM or Substrate" checks across dapps, follow the code of EVM only from now on