Merge #11370: [test] Add getblockchaininfo functional test
f6ffb14 [test] Add getblockchaininfo functional test (João Barbosa)
fd8f45f [test] Add restart_node to BitcoinTestFramework (João Barbosa)
Pull request description:
Adds functional test for `getblockchaininfo`. Also deals with the fact that `pruneheight` is only in the response when pruning is enabled (related to #11366).
Tree-SHA512: 56cdec0921f572874f2fdded0990d1722d1435c3ff9979e6bff1afdccdca6f8b214dbe8d7490cdac07b5758909db085132d14340de2cce943241f7ebde7e5b6c