This change introduces a new zerologadapter that allows
users to pass the actual logger via context.Context. Especially HTTP
middleware might choose to use `(*zerolog.Logger).WithContext` and
`zerolog.Ctx`. Allowing users to extract the logger from the context
keeps the full enriched logger available when pgx emits logs.
WithContextFunc adds possibility to get request scoped values from the
ctx.Context before logging lines.
WithoutPGXModule disables adding module:pgx to the default logger context.
zap.Any falls back to zap.Reflect, but is better for this case, because
it first checks for the types that zap handles specially. For example,
time.Duration, or error, which zap.Reflect will just treat as untyped
int64 or struct objects, but zap.Any is able to detect these types and
print them properly.
