Make collect-strings script compatible with Node v24

According to [1], `import.meta.main` is now a boolean in Node 24, and we
can just check its state directly without checking against
`import.meta.url`. This CL updates this logic per Node 24 so that our
collect-string script runs correctly.

[1]: https://nodejs.org/en/blog/release/v24.2.0#importmetamain-is-now-available

Bug: 480724539
Change-Id: Iafd721d604dc5c63a34eecedd3c1a9d9f21692d4
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7548063
Reviewed-by: Simon Zünd <szuend@chromium.org>
Auto-Submit: Changhao Han <changhaohan@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>

Author: hanselfmu-chromium

third_party/i18n/collect-strings.js

@@ -741,7 +741,7 @@ export function writeStringsToCtcFiles(directory, locale, strings) {
 }
 
 // @ts-ignore Test if called from the CLI or as a module.
-if (import.meta.url === import.meta.main) {
+if (import.meta.main) {
   if (process.argv.length === 2) {
     throw new Error(
         'Provide at least one directory from which to collect strings!',