Add Jenkins automation for IBM i release builds

.github/Jenkinsfile

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+pipeline {
+	agent {
+    node {
+      label 'ibmi7.3'
+    }
+  }
+  environment {
+     NODE_PATH = '/QOpenSys/pkgs/lib/nodejs18/bin'
+  }
+  stages {
+    stage('build') {
+      steps {
+        sh '''
+            export PATH=$NODE_PATH:$PATH
+            npm ci --production
+            ./node_modules/.bin/node-pre-gyp rebuild --production
+            ./node_modules/.bin/node-pre-gyp package
+        '''
+      }
+    }
+    stage('update-gh-release') {
+      environment {
+        GH_TOKEN = credentials('node-odbc-gh-token')
+      }
+      steps {
+        sh '''
+           export PATH=$NODE_PATH:$PATH
+           export GITHUB_TOKEN=$GH_TOKEN_PSW
+           node .github/upload-release-asset.js build/stage/*.tar.gz
+        '''
+      }
+    }
+  }
+}

.github/upload-release-asset.js

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+const fs = require('fs');
+const path = require('node:path');
+
+const tag = process.env.TAG_NAME;
+const token = process.env.GITHUB_TOKEN;
+const files = process.argv.slice(2);
+
+if (!tag) {
+    console.error("Must set TAG_NAME environment variable");
+    process.exit(1);
+}
+if (!token) {
+    console.error("Must set GITHUB_TOKEN environment variable");
+    process.exit(1);
+}
+if (!files.length) {
+    console.error("No files passed");
+    process.exit(1);
+}
+
+const options = {
+    headers: {
+        "Authorization": `Bearer ${token}`,
+        "X-GitHub-Api-Version": "2022-11-28",
+        "Accept": "application/vnd.github+json",
+        "Content-Type": "application/octet-stream",
+    }
+};
+
+(async function script() {
+    const response = await fetch(`https://api.github.com/repos/IBM/node-odbc/releases/tags/${tag}`);
+
+    if (!response.ok) {
+        console.error(`ERROR: Getting release failed: ${response.status}`)
+        process.exit(1);
+    }
+
+    const release_obj = await response.json();
+
+    // Returns a goofy URL "template", get rid of the parameters
+    const upload_url = release_obj.upload_url.substr(0, release_obj.upload_url.indexOf('{'));;
+
+    for (const file of files) {
+        const name = path.basename(file);
+        console.log(`Uploading ${file} -> ${name}`);
+
+        const content = fs.readFileSync(file);
+
+        const response = await fetch(`${upload_url}?name=${name}`, {
+            method: "POST",
+            body: content,
+            ...options
+        });
+
+        if (!response.ok) {
+            console.error(`ERROR: Upload of ${file} failed: ${response.status}`)
+            process.exit(1);
+        }
+    }
+})();