Merge #6527: fix: avoid extra work in GetListForBlockInternal before dip0003 activation

82684ea fix: avoid extra work in GetListForBlockInternal before dip0003 activation (UdjinM6)

Pull request description:

  ## Issue being fixed or feature implemented
  There could be no DMN before DIP0003, so let's bail out early. The result is less evodb reads and no `initial snapshot` spam in logs when syncing from scratch.

  ## What was done?

  ## How Has This Been Tested?

  ## Breaking Changes
  n/a

  ## Checklist:
  - [ ] I have performed a self-review of my own code
  - [ ] I have commented my code, particularly in hard-to-understand areas
  - [ ] I have added or updated relevant unit/integration/functional/e2e tests
  - [ ] I have made corresponding changes to the documentation
  - [ ] I have assigned this pull request to a milestone _(for repository code-owners and collaborators only)_

ACKs for top commit:
  PastaPastaPasta:
    utACK 82684ea

Tree-SHA512: 285c8df682af026593f81402340bfe2376c69b1b77d69c7324a4769a128e5ba62041d59fb0d32cc6fdd51048851127b632aab42bf0645f94b162cfad0dbfb316

Author: PastaPastaPasta

src/evo/deterministicmns.cpp

@@ -1018,8 +1018,14 @@ void CDeterministicMNManager::HandleQuorumCommitment(const llmq::CFinalCommitmen
 
 CDeterministicMNList CDeterministicMNManager::GetListForBlockInternal(gsl::not_null<const CBlockIndex*> pindex)
 {
-    AssertLockHeld(cs);
     CDeterministicMNList snapshot;
+
+    if (!DeploymentActiveAt(*pindex, Params().GetConsensus(), Consensus::DEPLOYMENT_DIP0003)) {
+        return snapshot;
+    }
+
+    AssertLockHeld(cs);
+
     std::list<const CBlockIndex*> listDiffIndexes;
 
     while (true) {