* gnu/packages/telegram.scm (telegram-desktop): Update to 2.9.3.
[#:configure-flags]: Add "-DDESKTOP_APP_DISABLE_WEBKITGTK=ON".
[#:phases]: Copy lib_waylandshells and lib_webview.
[native-inputs]: Bump cmake_helpers to a bespoke commit.
[inputs]: Add glibmm, jemalloc, qtsvg, and rnnoise.
Add sources for lib_waylandshells and lib_webview.
Bump lib_base, lib_crl, lib_lottie, lib_qr, lib_rpl, lib_spellcheck,
lib_storage, lib_tl, and lib_webrtc to bespoke commits that would otherwise
be used by recursive checkout.
43b9419bdc