Uplevel xterm.js

Brings in a bunch of changes from xterm.js@2.8.0 as well as some extra fixes.

Fixes #30260 (for v1.15)
Fixes #29723

npm-shrinkwrap.json

@@ -440,9 +440,9 @@
       "resolved": "https://registry.npmjs.org/winreg/-/winreg-1.2.0.tgz"
     },
     "xterm": {
-      "version": "2.7.0",
-      "from": "Tyriar/xterm.js#vscode-release/1.14",
-      "resolved": "git+https://github.com/Tyriar/xterm.js.git#7d7207a592461f15711f2f5df46eb5b1a7726da4"
+      "version": "2.8.0",
+      "from": "Tyriar/xterm.js#vscode-release/1.15",
+      "resolved": "git+https://github.com/Tyriar/xterm.js.git#81204d4ff2e80b4d1fb89e5e4c2cd436124193b3"
     },
     "yauzl": {
       "version": "2.3.1",

package.json

@@ -43,7 +43,7 @@
     "vscode-ripgrep": "0.0.12",
     "vscode-textmate": "^3.1.5",
     "winreg": "1.2.0",
-    "xterm": "Tyriar/xterm.js#vscode-release/1.14",
+    "xterm": "Tyriar/xterm.js#vscode-release/1.15",
     "yauzl": "2.3.1"
   },
   "devDependencies": {