🐛 fix: resolve build regressions in auth-lifecycle and settings-migration tests

- Fix malformed string literal in stellar providers_test.go
- Remove duplicate test files in missions package (share_test.go, share_error_test.go)
- Fix argument order in workloads NewWorkloadHandlers calls
- Remove duplicate persistence_test.go in workloads

These files contained:
1. Unterminated string literal causing build failure
2. Duplicate test function declarations
3. Undefined function references
4. Incorrect handler constructor argument order

Fixes #19275
Fixes #19276

Signed-off-by: GitHub Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: GitHub Copilot <copilot@kubestellar.io>

Author: GitHub Copilot