Merge bitcoin/bitcoin#28071: ci: Add missing -O2 to valgrind tasks

fa4ccf1 ci: Add missing -O2 to valgrind tasks (MarcoFalke)

Pull request description:

  Currently the tasks have nothing (`-O0`) set, which makes them slow.

  Fix this by falling back to the default (`-O2`).

ACKs for top commit:
  recursive-rat4:
    utACK fa4ccf1
  dergoegge:
    utACK fa4ccf1

Tree-SHA512: 44d803000d883cfa534f2c76d793d7d7f840e114fc377d20fc36d008b471d69ec9f0170358ed1f3567d49e3ff63682244062c954cd0b963df31ca39c08d2d5b9

Author: fanquake

ci/test/00_setup_env_native_fuzz_with_valgrind.sh

@@ -16,5 +16,5 @@ export RUN_FUZZ_TESTS=true
 export FUZZ_TESTS_CONFIG="--valgrind"
 export GOAL="install"
 # Temporarily pin dwarf 4, until using Valgrind 3.20 or later
-export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer CC=clang CXX=clang++ CFLAGS='-gdwarf-4' CXXFLAGS='-gdwarf-4'"
+export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer CC='clang -gdwarf-4' CXX='clang++ -gdwarf-4'"
 export CCACHE_SIZE=200M

ci/test/00_setup_env_native_valgrind.sh

@@ -14,4 +14,4 @@ export NO_DEPENDS=1
 export TEST_RUNNER_EXTRA="--exclude feature_init,rpc_bind,feature_bind_extra"  # Excluded for now, see https://github.com/bitcoin/bitcoin/issues/17765#issuecomment-602068547
 export GOAL="install"
 # Temporarily pin dwarf 4, until using Valgrind 3.20 or later
-export BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --with-gui=no CC=clang CXX=clang++ CFLAGS='-gdwarf-4' CXXFLAGS='-gdwarf-4'"  # TODO enable GUI
+export BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --with-gui=no CC='clang -gdwarf-4' CXX='clang++ -gdwarf-4'"  # TODO enable GUI