Correct key for version info assigment

[rak-phillip]

Summary

This corrects the key used for version info assignment from chartName to a computed property name. This regression was introduced during the initial Vue3 migration push while attempting to get a functional RKE2 provisioning¹

This also corrects keys that were incorrectly replaced at the time.

Fixes #12016

Occurred changes and/or fixed issues

• Update all invalid instances where set was replace and a computed property name should have been used

Technical notes summary

• We might want to double-check the linked commit¹ for any other instances that might have been overlooked

Areas or cases that should be tested

• RKE2 cluster provisioning (instructions in linked issue)

Areas which could experience regressions

• RKE2 cluster provisioning

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes

Footnotes

1. https://github.com/rancher/dashboard/commit/31646c2eae647c090accdc1e777f247779f6cc6f#diff-6836ab4af70ed1f33db60d2de9a0087b636d7604c3f1cf6bb6525f50f16a69aeR1544 ↩ ↩²