ci: disable fixup commit messages

Fixup commit messages are not permitted in this repository. This update modifies the `ng-dev` commit message validator configuration to prevent such commits.

(cherry picked from commit 55f7d87)

.aspect/rules/external_repository_action_cache/npm_translate_lock_MzA5NzUwNzMx

@@ -2,7 +2,7 @@
 # Input hashes for repository rule npm_translate_lock(name = "npm2", pnpm_lock = "@//:pnpm-lock.yaml").
 # This file should be checked into version control along with the pnpm-lock.yaml file.
 .npmrc=-2023857461
-package.json=600977484
-pnpm-lock.yaml=1098191211
+package.json=981583516
+pnpm-lock.yaml=-156871509
 pnpm-workspace.yaml=1711114604
-yarn.lock=-1503170765
+yarn.lock=1479673

.ng-dev/commit-message.mjs

@@ -9,6 +9,7 @@ export const commitMessage = {
   maxLineLength: Infinity,
   minBodyLength: 0,
   minBodyLengthTypeExcludes: ['docs'],
+  disallowFixup: true,
   // Note: When changing this logic, also change the `contributing.ejs` file.
   scopes: packages.map(({ name }) => name),
 };

package.json

@@ -54,7 +54,7 @@
     "@angular/forms": "19.0.0",
     "@angular/localize": "19.0.0",
     "@angular/material": "19.0.0-rc.3",
-    "@angular/ng-dev": "https://github.com/angular/dev-infra-private-ng-dev-builds.git#8214e3156e6c9eb06089f7c50bec735a2cb73c3b",
+    "@angular/ng-dev": "https://github.com/angular/dev-infra-private-ng-dev-builds.git#2dde6a7f809c2928ab1c7b85afb7fec0c49beafc",
     "@angular/platform-browser": "19.0.0",
     "@angular/platform-browser-dynamic": "19.0.0",
     "@angular/platform-server": "19.0.0",