Add go licenses to licenses.txt (#21034)

`make go-licenses` will generate `assets/go-licenses.json` which is then included in the webpack build. 

This step depends on both go and node being present, so unfortunately, I could not automate the generation by hooking it up to `tidy` as that target is triggered on CI where we do not have a docker image with both go an node.

It should be ran from time to time, ideally after each go mod update.

webpack.config.js

@@ -9,6 +9,7 @@ import EsBuildLoader from 'esbuild-loader';
 import {parse, dirname} from 'path';
 import webpack from 'webpack';
 import {fileURLToPath} from 'url';
+import {readFileSync} from 'fs';
 
 const {VueLoaderPlugin} = VueLoader;
 const {ESBuildMinifyPlugin} = EsBuildLoader;
@@ -205,10 +206,16 @@ export default {
       outputFilename: 'js/licenses.txt',
       outputWriter: ({dependencies}) => {
         const line = '-'.repeat(80);
-        return dependencies.map((module) => {
-          const {name, version, licenseName, licenseText} = module;
+        const goModules = JSON.parse(readFileSync('assets/go-licenses.json', 'utf8'));
+        const jsModules = dependencies.map(({name, version, licenseName, licenseText}) => {
           const body = wrapAnsi(licenseText || '', 80);
-          return `${line}\n${name}@${version} - ${licenseName}\n${line}\n${body}`;
+          return {name, version, licenseName, body};
+        });
+
+        const modules = [...goModules, ...jsModules].sort((a, b) => a.name.localeCompare(b.name));
+        return modules.map(({name, version, licenseName, body}) => {
+          const title = licenseName ? `${name}@${version} - ${licenseName}` : name;
+          return `${line}\n${title}\n${line}\n${body}`;
         }).join('\n');
       },
       override: {