```
Preparation to deprecate ParseNonRFCJSONValue() but keep test coverage
on the underlying UniValue::read() unaffected. The test coverage on
AmountFromValue is no longer included, since that is already tested
in the rpc_parse_monetary_values test case.
Fuzzing coverage on ParseNonRFCJSONValue() was duplicated between string.cpp and parse_univalue.cpp, only the one in parse_univalue.cpp is kept.
```
Backport of core#27256.
Depends on D16293.