node: Fix generator ripgrep binary mappings and add missing architectures

The @vscode/ripgrep package postinstall script expects specific binary
variants for each architecture. This patch:

1. Adds backwards compatibility for aarch64 libc variants
   - Versions < 1.13.0 used gnu variant (aarch64-unknown-linux-gnu)
   - Versions >= 1.13.0 switched to musl (aarch64-unknown-linux-musl)
   - Both variants exist in different ripgrep-prebuilt releases

2. Adds missing architecture mappings for ppc64, riscv64, and s390x
   - These architectures are supported by @vscode/ripgrep
   - Uses gnu variants (only available option for these arches)

This prevents the postinstall script from failing to find the cached
binary and attempting to download from GitHub, which fails in offline
build environments (RPM builds, air-gapped systems, etc).

The mappings now match what the postinstall script expects based on
the package version being used.

See: https://github.com/microsoft/vscode-ripgrep/blob/main/lib/postinstall.js

Assisted-by: Claude Code

Author: LorbusChris

node/flatpak_node_generator/providers/special.py

@@ -303,11 +303,19 @@ async def get_ripgrep_tag(version: str) -> str:
             return match.group(1)
 
         tag = await get_ripgrep_tag(package.version)
+
+        # vscode-ripgrep switched from -gnu to -musl for aarch64 in v1.13.0
+        # (when they added musl detection logic)
+        use_gnu_aarch64 = SemVer.parse(package.version) < SemVer.parse('1.13.0')
+
         ripgrep_arch_map = {
             'x86_64': 'x86_64-unknown-linux-musl',
             'i386': 'i686-unknown-linux-musl',
             'arm': 'arm-unknown-linux-gnueabihf',
-            'aarch64': 'aarch64-unknown-linux-gnu',
+            'aarch64': 'aarch64-unknown-linux-gnu' if use_gnu_aarch64 else 'aarch64-unknown-linux-musl',
+            'ppc64': 'powerpc64le-unknown-linux-gnu',
+            'riscv64': 'riscv64gc-unknown-linux-gnu',
+            's390x': 's390x-unknown-linux-gnu',
         }
         destdir = self.gen.data_root / 'tmp' / f'vscode-ripgrep-cache-{package.version}'
         for arch, ripgrep_arch in ripgrep_arch_map.items():