Bug 1907973 - Load FTS5 extension for Suggest, r=nanj,urlbar-reviewers,adw

We need to do this now that we're creating FTS tables. I believe this
should fix the vendoring issues.  The following tests were failing
before and now are succeeding on my machine:

./mach test browser/components/urlbar/tests/quicksuggest/unit
./mach test browser/components/search/test/browser/telemetry/browser_search_telemetry_sources.js

Differential Revision: https://phabricator.services.mozilla.com/D216598

toolkit/components/uniffi-bindgen-gecko-js/components/generated/RustSuggest.sys.mjs

@@ -797,18 +797,14 @@ export class SuggestStoreBuilder {
                 }
                 throw e;
             }
-            return UniFFIScaffolding.callAsync(
+            return UniFFIScaffolding.callSync(
                 27, // suggest:uniffi_suggest_fn_method_suggeststorebuilder_load_extension
                 FfiConverterTypeSuggestStoreBuilder.lower(this),
                 FfiConverterString.lower(libraryName),
                 FfiConverterOptionalstring.lower(entrypoint),
             )
         }
-        try {
-            return functionCall().then((result) => handleRustResult(result, liftResult, liftError));
-        }  catch (error) {
-            return Promise.reject(error)
-        }
+        return handleRustResult(functionCall(), liftResult, liftError);
     }
 
     remoteSettingsBucketName(bucketName) {

toolkit/components/uniffi-bindgen-gecko-js/config.toml

@@ -29,6 +29,7 @@ main = [
   "SuggestStore.interrupt",
   "SuggestStoreBuilder",
   "SuggestStoreBuilder.data_path",
+  "SuggestStoreBuilder.load_extension",
   "SuggestStoreBuilder.remote_settings_bucket_name",
   "SuggestStoreBuilder.remote_settings_server",
   "SuggestStoreBuilder.build",