remove references to AlgoScan

[ryanRfox]

Describe the error
/run-a-node-setup/install](https://developer.algorand.org/docs/run-a-node/setup/install/ contains a reference to AlgoScan, which is now shut.

Link to the page or line
https://github.com/algorand/docs/edit/staging/docs/run-a-node/setup/install.md#L48

Optional - The recommended fix if you have one
Scan the entire site for any additional references and make appropriate updates.

[iskysun96]

We also should remove reference to MyAlgo. Can find one example here: https://developer.algorand.org/docs/get-details/ethereum_to_algorand/?from_query=eth#template-modal-overlay:~:text=wallet,MyAlgoWallet%20with%20MyAlgoConnect

Also need to remove reference to PureStake, Rand API: https://developer.algorand.org/docs/get-details/ethereum_to_algorand/?from_query=eth#template-modal-overlay:~:text=API%20service,provide%20access%20too