Rust: Re-categorize tokio-postgres sources as remote.

[geoffw0]

Re-categorize tokio-postgres sources as remote. It turns out their existing type, database, is a local source type and this leads to the sources being disabled in the default configuration. The new type, remote, reflects the fact that tokio_postgres is intended to connect to remote (and local) databases, so these are potentially remote data sources.

@GeekMasher FYI

Update: if we do this, we will want to update the sources from #18577 as well.

PR Overview

This pull request updates the type categorization for tokio-postgres sources from "database" to "remote" to better reflect the intended usage of the library.

• Update the classification in the tokio-postgres model YAML file.

Changes

File	Description
rust/ql/lib/codeql/rust/frameworks/tokio-postgres.model.yml	Updated source type from "database" to "remote" to align the configuration with the library’s connectivity characteristics

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[geoffw0]

There is an alternative approach, which is to reconsider database sources being a sub-category of local and thus disabled in the default configuration. We'd have to loop in a few more people if we want to go that route, since the default configuration affects analysis in all languages.