fa8e650b525e9493bdfa393c0c3e34cb22c78c08 rest: Use mempool from node context instead of global (MarcoFalke)
fa660d65d7cc401ad5bbfdc076a074de19a79329 node: Use mempool from node context instead of global (MarcoFalke)
facbaf092f1ab298943206603cff6e6e3d30d452 rpc: Use mempool from node context instead of global (MarcoFalke)
Pull request description:
Currently they are identical, but in the future we might want to turn the mempool into a unique_ptr. Replacing the global with the mempool pointer from the node context simplifies this step.
ACKs for top commit:
jnewbery: Code review ACK fa8e650b5 ryanofsky: Code review ACK fa8e650b525e9493bdfa393c0c3e34cb22c78c08, Only the discussed REST server changes since the last review.
Backport of Core PR17564
Depends on D7965