fix(v3): Fix sessions disappearing from trees caused by `zowe.extRefresh`

[t1m0thyj]

Proposed changes

Fixes #2906

Release Notes

Milestone: v3

Changelog: Fixed issue where creating new team configuration file could cause Zowe Explorer to crash, resulting in all sessions disappearing from trees

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Enhancement (non-breaking change which adds or improves functionality)
• [ ] Breaking change (a change that would cause existing functionality to not work as expected)
• [ ] Documentation (Markdown, README updates)
• [ ] Other (please specify above in "Proposed changes" section)

Checklist

General

• [ ] I have read the CONTRIBUTOR GUIDANCE wiki
• [ ] All PR dependencies have been merged and published (if applicable)
• [ ] A GIF or screenshot is included in the PR for visual changes
• [ ] The pre-publish command has been executed:
  • v2 and below: yarn workspace vscode-extension-for-zowe vscode:prepublish
  • v3: pnpm --filter vscode-extension-for-zowe vscode:prepublish

Code coverage

• [ ] There is coverage for the code that I have added
• [ ] I have added new test cases and they are passing
• [ ] I have manually tested the changes

Deployment

• [ ] I have added developer documentation (if applicable)
• [ ] Documentation should be added to Zowe Docs
  • If you're an outside contributor, please post in the #zowe-doc Slack channel to coordinate documentation.
  • Otherwise, please check with the rest of the squad about any needed documentation before merging.
• [ ] These changes may need ported to the appropriate branches (list here):

Further comments

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.82%. Comparing base (3ba345a) to head (685aa30).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## next #3009 +/- ## ========================================== + Coverage 92.74% 92.82% +0.08% ========================================== Files 107 107 Lines 10882 10887 +5 Branches 2360 2358 -2 ========================================== + Hits 10092 10106 +14 + Misses 788 779 -9 Partials 2 2 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
3.1% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud