collab: Store features provided by extensions in the database (#24303)

This PR adds new columns to the `extension_versions` table to record
which features an extension provides.

These `provides_*` columns are populated from the `provides` field on
the extension manifest.

We'll be able to leverage this data in the future for showing what an
extension provides in the extensions UI, as well as allowing to filter
by extensions that provide a certain feature.

Release Notes:

- N/A

crates/collab/src/db.rs

@@ -6,10 +6,11 @@ pub mod tests;
 
 use crate::{executor::Executor, Error, Result};
 use anyhow::anyhow;
-use collections::{BTreeMap, HashMap, HashSet};
+use collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use dashmap::DashMap;
 use futures::StreamExt;
 use rand::{prelude::StdRng, Rng, SeedableRng};
+use rpc::ExtensionProvides;
 use rpc::{
     proto::{self},
     ConnectionId, ExtensionMetadata,
@@ -781,6 +782,7 @@ pub struct NewExtensionVersion {
     pub repository: String,
     pub schema_version: i32,
     pub wasm_api_version: Option<String>,
+    pub provides: BTreeSet<ExtensionProvides>,
     pub published_at: PrimitiveDateTime,
 }