`verify` only checks one return type for RPCs that have multiple

[jamillambert]

Some RPCs have more than one type defined in types for different return shapes (list below created by AI so may be incorrect):

• getblock (varies by verbosity)
• getblockheader (varies by verbose)
• getrawtransaction (varies by verbose/verbosity)
• getrawmempool (varies by verbose)
• getmempoolancestors (varies by verbose)
• getmempooldescendants (varies by verbose)
• scantxoutset (varies by action: start/status/abort)
• scanblocks (varies by action: start/status/abort)
• sendmany (varies by verbose)

In verify only one of the return types is listed in METHODS. This means the reexports etc. of the other types returned by these RPCs are not checked by running verify.