Improve error message when reading NaN (PostgreSQL)

[janpio]

When trying to read a float column with a NaN value you get the following error message both with find* and the raw API:

PrismaClientRustPanicError:
Invalid `prisma.queryRaw()` invocation:

PANIC: f64 is not a Decimal: Error { message: "Invalid decimal: invalid character" }

This is a non-recoverable error which probably happens when the Prisma Query Engine has a panic.

          at PrismaClientFetcher.request (/Users/divyendusingh/Documents/prisma/triage/prisma-client-js-797/node_modules/@prisma/client/runtime/index.js:1:227975)
          at processTicksAndRejections (internal/process/task_queues.js:97:5)

This was reported in prisma/prisma-client-js#797.

As the Prisma Engines currently do not support NaN at all (feature request tracked at #3492), we should output a more helpful error message to the user.

(Rough technical information from a conversation with Julius: When we read the data, we can check if it is NaN and fail harder instead of trying to convert it to decimal which causes the panic listed above)

The error message can possibly also link to a documentation article that explains this limitation or Prisma further.