Merge bitcoin/bitcoin#32970: ci: Enable more shellcheck

fa1fd07 ci: Enable more shellcheck (MarcoFalke)

Pull request description:

  shellcheck is often the main "reviewer" of CI code written in Bash, so it seems odd to disable it by putting commands into `bash -c "cmd..."`.

  Fix that by removing `bash -c`, where it isn't intended and where the removal is easily possible.

ACKs for top commit:
  hebasto:
    ACK fa1fd07.

Tree-SHA512: 6412dd3f8d702bca7762a8f1be3f9d2782132936fcc7ae5c31690b594e04f69708110e6f6233d5a61901289d13c7089ab5646a2c3ef2266fffc36d0543f4b7ae

Author: fanquake

ci/test/03_test_script.sh

@@ -122,7 +122,11 @@ if [[ "${RUN_TIDY}" == "true" ]]; then
   BITCOIN_CONFIG_ALL="$BITCOIN_CONFIG_ALL -DCMAKE_EXPORT_COMPILE_COMMANDS=ON"
 fi
 
-bash -c "cmake -S $BASE_ROOT_DIR -B ${BASE_BUILD_DIR} $BITCOIN_CONFIG_ALL $BITCOIN_CONFIG || ( (cat $(cmake -P "${BASE_ROOT_DIR}/ci/test/GetCMakeLogFiles.cmake")) && false)"
+bash -c "cmake -S $BASE_ROOT_DIR -B ${BASE_BUILD_DIR} $BITCOIN_CONFIG_ALL $BITCOIN_CONFIG" || (
+  # shellcheck disable=SC2046
+  cat $(cmake -P "${BASE_ROOT_DIR}/ci/test/GetCMakeLogFiles.cmake")
+  false
+)
 
 # shellcheck disable=SC2086
 cmake --build "${BASE_BUILD_DIR}" "$MAKEJOBS" --target all $GOAL || (