Merge bitcoin/bitcoin#32087: ci: Drop ENABLE_HARDENING=OFF from clang-tidy

7d34c19 ci: Drop ENABLE_HARDENING=OFF from clang-tidy (David Gumberg)

Pull request description:

  Split out from #32071

  It's not clear why this was added in the first place, but it is not necessary currently.

  bitcoin/bitcoin#32038 (comment) bitcoin/bitcoin#24753.

ACKs for top commit:
  fanquake:
    ACK 7d34c19

Tree-SHA512: 9ffab10349f52aed77d002155da59f13f0954e6bc1ac1edbddcbb9e70aa2db3b0b0307eb35f8b791589f2157705a96d463589d4270f4873e9037a9ef88807b56

Author: fanquake

ci/test/00_setup_env_native_tidy.sh

@@ -20,7 +20,6 @@ export RUN_TIDY=true
 export GOAL="install"
 export BITCOIN_CONFIG="\
  -DWITH_ZMQ=ON -DBUILD_GUI=ON -DBUILD_BENCH=ON -DWITH_USDT=ON -DWITH_BDB=ON -DWARN_INCOMPATIBLE_BDB=OFF \
- -DENABLE_HARDENING=OFF \
  -DCMAKE_C_COMPILER=clang-${TIDY_LLVM_V} \
  -DCMAKE_CXX_COMPILER=clang++-${TIDY_LLVM_V} \
  -DCMAKE_C_FLAGS_RELWITHDEBINFO='-O0 -g0' \