fix(generator): add long dependency to CJS template and update baselines

[suztomo]

This PR adds the missing "long" dependency to the CommonJS package.json template in gapic-generator-typescript, and updates the baselines to match.

Why long is in devDependencies

long is only required during the compilation phase of the library itself to resolve type definitions in the generated protos/protos.d.ts (which has import Long = require("long");). It is not directly imported in the runtime JavaScript code. At runtime, long is transitively resolved via google-gax -> protobufjs, so it does not need to be a production dependency of the generated library.

GAX

It also updates the google-gax dependency version to ^5.0.0 in the template to match the recently introduced google-maps-mapmanagement package:
https://github.com/googleapis/google-cloud-node/blob/6f9710c504c5272dfb59a77c7da98235ed9cf3ff/packages/google-maps-mapmanagement/package.json. The latest (non-RC) GAX version is 5.0.7: https://www.npmjs.com/package/google-gax?activeTab=versions.

[gemini-code-assist]

Code Review

This pull request adds the long package to devDependencies in multiple baseline and template package.json files. The reviewer correctly points out that since long is used at runtime by the generated GAPIC code, it must be declared under dependencies rather than devDependencies to avoid runtime MODULE_NOT_FOUND errors for consumers.