Don't look for for non-top frame locals in node >=18 during locals tests

[matux]

[!IMPORTANT]

Post-merge comment

Locals seem to be available after all but changes in how Node 18 deliver call frames has broken our mechanism to extract these.

This is now a bug, and we should be able to revert these changes once we figure out how to extract locals for Node 18+.

Refer to ticket SC-134017.

Description of the change

This PR fixes a failing test running over false assumptions around node/v8 locals in stack traces.

After careful testing, beginning Node.js 18, it seems locals are only present in top frames. However, I wasn't able to pinpoint documentation about this.

[!NOTE] This PR also updates CI to run installs and tests under lts nodes 14 through latest.

Type of change

• [ ] Bug fix (non-breaking change that fixes an issue)
• [ ] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Maintenance
• [ ] New release

Checklists

Development

• [x] Lint rules pass locally
• [x] The code changed/added as part of this pull request has been covered with tests
• [x] All tests related to the changed code pass in development

Code review

• [x] This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• [x] "Ready for review" label attached to the PR and reviewers assigned
• [ ] Issue from task tracker has a link to this pull request
• [ ] Changes have been reviewed by at least one other engineer

[shortcut-integration[bot]]

This pull request has been linked to Shortcut Story #134017: rollbar.js isn't capturing locals except for the top frame.