[build] Provide ARM build of RE2 (#84163)

Signed-off-by: Tyler Smalley <tyler.smalley@elastic.co>

src/dev/build/tasks/patch_native_modules_task.ts

@@ -46,15 +46,30 @@ const packages: Package[] = [
     destinationPath: 'node_modules/re2/build/Release/re2.node',
     extractMethod: 'gunzip',
     archives: {
-      darwin: {
+      'darwin-x64': {
         url: 'https://github.com/uhop/node-re2/releases/download/1.15.4/darwin-x64-72.gz',
         sha256: '983106049bb86e21b7f823144b2b83e3f1408217401879b3cde0312c803512c9',
       },
-      linux: {
+      'linux-x64': {
         url: 'https://github.com/uhop/node-re2/releases/download/1.15.4/linux-x64-72.gz',
         sha256: '8b6692037f7b0df24dabc9c9b039038d1c3a3110f62121616b406c482169710a',
       },
-      win32: {
+
+      // ARM build is currently done manually as Github Actions used in upstream project
+      // do not natively support an ARM target.
+
+      // From a AWS Graviton instance:
+      // * checkout the node-re2 project,
+      // * install Node using the same minor used by Kibana
+      // * npm install, which will also create a build
+      // * gzip -c build/Release/re2.node > linux-arm64-72.gz
+      // * upload to kibana-ci-proxy-cache bucket
+      'linux-arm64': {
+        url:
+          'https://storage.googleapis.com/kibana-ci-proxy-cache/node-re2/uhop/node-re2/releases/download/1.15.4/linux-arm64-72.gz',
+        sha256: '5942353ec9cf46a39199818d474f7af137cfbb1bc5727047fe22f31f36602a7e',
+      },
+      'win32-x64': {
         url: 'https://github.com/uhop/node-re2/releases/download/1.15.4/win32-x64-72.gz',
         sha256: '0a6991e693577160c3e9a3f196bd2518368c52d920af331a1a183313e0175604',
       },
@@ -84,7 +99,7 @@ async function patchModule(
       `Can't patch ${pkg.name}'s native module, we were expecting version ${pkg.version} and found ${installedVersion}`
     );
   }
-  const platformName = platform.getName();
+  const platformName = platform.getNodeArch();
   const archive = pkg.archives[platformName];
   const archiveName = path.basename(archive.url);
   const downloadPath = config.resolveFromRepo(DOWNLOAD_DIRECTORY, pkg.name, archiveName);