Regression: `@google-cloud/pubsub` fails to run due to JWA dependency in `google-auth-library` for node v24.0.0-rc.3 and later

Hello team,

I'm encountering a failure when using the @google-cloud/pubsub package with Node.js versions v24.0.0-rc.3 and later. The issue appears to be related to a transitive dependency within the google-auth-library-nodejs package.

The following code, which works reliably on earlier Node.js versions, now fails starting from v24.0.0-rc.3:

`const [topic] = await pubSubClient.topic(topicName);`

Error:

```
/Users/abhi/instana/test-apps/pubsub/node_modules/buffer-equal-constant-time/index.js:37
var origSlowBufEqual = SlowBuffer.prototype.equal;
^

TypeError: Cannot read properties of undefined (reading 'prototype')
at Object. (/Users/abhi/instana/test-apps/pubsub/node_modules/buffer-equal-constant-time/index.js:37:35)
at Module._compile (node:internal/modules/cjs/loader:1734:14)
at Object..js (node:internal/modules/cjs/loader:1899:10)
at Module.load (node:internal/modules/cjs/loader:1469:32)
at Function._load (node:internal/modules/cjs/loader:1286:12)
at TracingChannel.traceSync (node:diagnostics_channel:322:14)
at wrapModuleLoad (node:internal/modules/cjs/loader:235:24)
at Module.require (node:internal/modules/cjs/loader:1491:12)
at require (node:internal/modules/helpers:135:16)
at Object. (/Users/abhi/instana/test-apps/pubsub/node_modules/jwa/index.js:1:19)

Node.js v24.0.0-rc.3
```

The issue is with a dependency in `googleapis/google-auth-library-nodejs` pkg.
* Works fine in: v24.0.0-rc.2 and earlier
* Fails in: v24.0.0-rc.3, v24.0.0-rc.4

🔍 Root Cause Investigation
After investigating the dependency tree, I’ve identified the root cause:
1. google-cloud/pubsub depends on google-auth-library-nodejs
→ [pubsub package.json](https://github.com/googleapis/nodejs-pubsub/blob/4108a691c71c64fc500d635e2ba2b3a281b0b978/package.json#L59)
2. google-auth-library-nodejs depends on jws
→ [auth-library package.json](https://github.com/googleapis/google-auth-library-nodejs/blob/629da74095ae51c258de13d924b65bb3c31ddf82/package.json#L26)
3. jws uses jwa
→ jws package.json
4. jwa depends on buffer-equal-constant-time
→ jwa package.json

The issue appears to stem from a problem in the jwa dependency chain.

📎 Related Issues & Discussions
* Migration request to drop jws from google-auth-library: https://github.com/googleapis/google-cloud-node/issues/7737
* Upstream issue in jwa: https://github.com/auth0/node-jwa/issues/46

Thanks In Advance