Fix lead batch item result type

[mesilov]

Q	A
Bug fix?	yes
New feature?	no
Deprecations?	no
Issues	N/A - supersedes #470; no separate issue exists
License	MIT

Fixes Services\CRM\Lead\Service\Batch::list() so batched lead listing yields LeadItemResult objects instead of DealItemResult objects.

Supersedes #470. That PR has the correct intent, but its branch is based on an old v3 ancestor and now contains a large amount of unrelated history and conflicts. This PR reapplies only the intended lead batch result-type fix on top of current v3-dev, keeping the review focused and mergeable.

The PR also fixes a malformed phpunit.xml.dist testsuite block that prevented PHPUnit from parsing the current v3-dev config.

Test plan

• make -s oa-schema-build BITRIX24_WEBHOOK=... - passed
• make test-file path=tests/Unit/Services/CRM/Lead/Service/BatchTest.php - failed before the fix with DealItemResult, passed after the fix
• make lint-cs-fixer - passed
• make lint-rector - passed
• make lint-phpstan - passed
• make lint-deptrac - passed
• make test-unit - passed, 1221 tests / 3336 assertions
• make lint-all - passed