merge-script 9460090f1a Merge bitcoin/bitcoin#35520: lint: remove redundant test suite uniqueness check
946feb3f1f test: remove redundant test suite uniqueness lint (Lőrinc)

Pull request description:

  Follow-up to https://github.com/bitcoin/bitcoin/pull/35451#discussion_r3403672298.

  **Problem:** That duplicate check in `test/lint/lint-tests.py` is redundant now: CMake already registers each Boost test suite as a CTest test name and rejects duplicates there.

  **Fix:** Remove the `check_unique_test_names` path and its now-unused duplicate helper and inline remaining helper into `main()`.

  **Reproducers:** These throwaway patches pass `test/lint/lint-tests.py` and fail during CMake test registration.

  <details><summary>Internal `src/test` duplicate</summary>

  ```diff
  diff --git a/src/test/base32_tests.cpp b/src/test/base32_tests.cpp
  index 051a8fcd25..3b50bff724 100644
  --- a/src/test/base32_tests.cpp
  +++ b/src/test/base32_tests.cpp
  @@ -54,3 +54,7 @@ BOOST_AUTO_TEST_CASE(base32_padding)
   }

   BOOST_AUTO_TEST_SUITE_END()
  +
  +BOOST_AUTO_TEST_SUITE(base32_tests)
  +BOOST_AUTO_TEST_CASE(base32_duplicate_probe) { BOOST_CHECK(true); }
  +BOOST_AUTO_TEST_SUITE_END()
  ```
  </details>
  <details><summary>Internal `src/wallet/test` duplicate</summary>

  ```diff
  diff --git a/src/wallet/test/wallet_rpc_tests.cpp b/src/wallet/test/wallet_rpc_tests.cpp
  index 8bf5eab443..854d010ec0 100644
  --- a/src/wallet/test/wallet_rpc_tests.cpp
  +++ b/src/wallet/test/wallet_rpc_tests.cpp
  @@ -37,5 +37,10 @@ BOOST_AUTO_TEST_CASE(ensure_unique_wallet_name)
       BOOST_CHECK_THROW(TestWalletName("/wallet/foobar", "foo"), UniValue);
   }

  +BOOST_AUTO_TEST_SUITE_END()
  +
  +BOOST_FIXTURE_TEST_SUITE(wallet_rpc_tests, BasicTestingSetup)
  +BOOST_AUTO_TEST_CASE(wallet_rpc_duplicate_probe) { BOOST_CHECK(true); }
  +
   BOOST_AUTO_TEST_SUITE_END()
   } // namespace wallet
  ```
  </details>
  <details><summary>Cross `src/test` and `src/wallet/test` duplicate</summary>

  ```diff
  diff --git a/src/wallet/test/CMakeLists.txt b/src/wallet/test/CMakeLists.txt
  index 524c7218f4..04628e0327 100644
  --- a/src/wallet/test/CMakeLists.txt
  +++ b/src/wallet/test/CMakeLists.txt
  @@ -8,6 +8,7 @@ target_sources(test_bitcoin
     PRIVATE
       init_test_fixture.cpp
       wallet_test_fixture.cpp
  +    base32_tests.cpp
       db_tests.cpp
       coinselector_tests.cpp
       coinselection_tests.cpp
  diff --git a/src/wallet/test/base32_tests.cpp b/src/wallet/test/base32_tests.cpp
  new file mode 100644
  index 0000000000..da91d87dca
  --- /dev/null
  +++ b/src/wallet/test/base32_tests.cpp
  @@ -0,0 +1,5 @@
  +#include <boost/test/unit_test.hpp>
  +
  +BOOST_AUTO_TEST_SUITE(base32_tests)
  +BOOST_AUTO_TEST_CASE(wallet_cross_duplicate_probe) { BOOST_CHECK(true); }
  +BOOST_AUTO_TEST_SUITE_END()
  ```
  </details>

  The CMake failures are in the form:

  ```text
  CMake Error at src/test/CMakeLists.txt:199 (add_test):
    add_test given test NAME "<duplicate_suite>" which already exists in this
    directory.
  ```

ACKs for top commit:
  maflcko:
    lgtm ACK 946feb3f1f
  sedited:
    ACK 946feb3f1f

Tree-SHA512: a511507d21db142b3f2ed6e966d9e8f1e7016e750de122d88f4502edc84c0cfc696054e757bf905ca58d9774ad6263b2a59ec8cbbcc1f3e28ed1896ba4cdd8aa
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