[ts-sdk] Remove "withRequestType" from API names

[Jordan-Mysten]

We added the new ${api}WithRequestType APIs to separate out calls to fullnode and gateway, but now that gateway has been fully removed, we can clean up function naming here and move back to the simpler API names.

[github-actions[bot]]

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[github-actions[bot]]

💳 Wallet Extension has been built, you can download the packaged extension here: https://github.com/MystenLabs/sui/actions/runs/3431171018#artifacts