This patch fixes the operator usage in src/test/*.c to use the symbolic
operators instead of the normal C comparison operators.
This patch was generated using:
./scripts/coccinelle/test-operator-cleanup src/test/*.[ch]
Circuit object wasn't freed correctly. Also, the cpath build state object
needed to be zeroed else we were freeing garbage pointers.
Closes#20936
Signed-off-by: David Goulet <dgoulet@torproject.org>