XTS Speedup Improvements

### Background

This epic is to speedup XTS by moving tests from XTS to MATS and enabling concurrent execution of HAPI tests. See this PR for an established pattern https://github.com/hiero-ledger/hiero-consensus-node/pull/23219

### Acceptance Criteria

Complete the sub-issues assigned to this Epic

### Dependencies

_No response_

### Definition of Ready (DoR) Checklist

- [ ] Clear acceptance criteria
- [ ] Clear and detailed description
- [ ] Dependencies identified
- [ ] Links to documentation
- [ ] Should be completable in 2-3 Days
- [ ] Initial draft of Low-level design document
- [ ] At least high level test plan
- [ ] Groomed/Estimated

### Definition of Done (DoD) Checklist

- [ ] Acceptance Criteria complete
- [ ] No Codacy issues greater than minor (in new code)
- [ ] JavaDocs updated/created
- [ ] Code commented
- [ ] Unit tests created/updated
- [ ] 80% test code coverage (in new code)
- [ ] Happy Path and major negative cases in HAPI tests as applicable

Start by reviewing the established pattern in PR #23219 and locating the sub-issues for this epic. Determine which XTS tests move to MATS and how HAPI tests are intended to run concurrently. Done means all sub-issues are complete and the acceptance criteria, tests, coverage, and documentation requirements are satisfied.

Written by the indexing model from the issue text.