Query annotations still have many side cases

[raymond-design]

Shouldn't every failure to generate sql code lead to a syntax warning? There still seems to be many ways to go around query annotation validations and get cases where nothing is generated and no error is logged.

Some side cases:

https://play.sqlc.dev/p/eda463647d63d4cf8567b5236c3a691c7b2b451f67a5b06dac33ce2936610848

Previously raised issues:

I'm aware that in earlier issues like #859, annotations like:
--name : DeleteAuthor :exec
have been fixed.

However, an annotation like:
--nam : DeleteAuthor :exec
could be typed, and no error is thrown.

I think we could just make the validation very strict and not have to deal with any annotation loopholes again. Any thoughts?

[kyleconroy]

This is sadly a hard problem to fix due query annotations being comments. Stricter validation would mean throwing errors for legitimate comments on queries.

Until we have a longer term solution, I'm comfortable with the current level of error handling.