Merge dashpay#6783: fix: resolve logical conflict between dash#6691 and dash#6775, compile error

0b8fe88 chore: resolve logical conflict between dash#6691 and dash#6775 (Kittywhiskers Van Gogh)

Pull request description:

  ## Additional Information

  [dash#6691](dashpay#6691) and [dash#6775](dashpay#6775) were merged into `develop` in that order, neither conflicting with the other. [dash#6775](dashpay#6775) updated the UniValue subtree before it was unsubtree'd and subsequent improvements were backported. To enable this, a syntax change was required which replaced `get_int()` with `getInt<int>()`, which, the code introduced in [dash#6691](dashpay#6691) didn't use as it was merged _before_ [dash#6775](dashpay#6775).

  As it was new code, this was not registered as a merge conflict but this logical conflict caused `develop` to fail ([build](https://github.com/dashpay/dash/actions/runs/16546102266)). This pull request remedies that issue.

  ## Breaking Changes

  None expected

  ## Checklist

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

ACKs for top commit:
  UdjinM6:
    utACK 0b8fe88
  knst:
    utACK 0b8fe88

Tree-SHA512: 7af4599e38bca5d776766cd8a2acda46d046f5dfe9f9c45586ac1f27fc709bd6ac913709b2c24d133ab57bbf2a6d5cb0630d0e874f62a472e173d61ced2face0

Author: kwvg

src/test/llmq_commitment_tests.cpp

@@ -142,8 +142,8 @@ BOOST_AUTO_TEST_CASE(commitment_json_test)
     BOOST_CHECK(json.exists("signersCount"));
     BOOST_CHECK(json.exists("validMembersCount"));
 
-    BOOST_CHECK_EQUAL(json["signersCount"].get_int(), commitment.CountSigners());
-    BOOST_CHECK_EQUAL(json["validMembersCount"].get_int(), commitment.CountValidMembers());
+    BOOST_CHECK_EQUAL(json["signersCount"].getInt<int>(), commitment.CountSigners());
+    BOOST_CHECK_EQUAL(json["validMembersCount"].getInt<int>(), commitment.CountValidMembers());
 }
 
 BOOST_AUTO_TEST_CASE(commitment_bitvector_json_test)