Fix 32096 UBSAN issues in gprofng

Fix 32096 UBSAN issues in gprofng

Fixed UBSAN runtime errors such as:
 - member call on address which does not point to an object of type 'Vector'
 - load of misaligned address 0x623e5a670173 for type 'int', which requires 4 byte alignment

gprofng/ChangeLog
2024-09-17  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>.

	PR gprofng/32096
	* libcollector/unwind.c: Fix UBSAN runtime errors.
	* src/CallStack.cc (add_stack_java, add_stack_java_epilogue):
	Change argument type to Vector<Histable*>*.
	* src/Experiment.cc (update_ts_in_maps): Change variable type.
	* src/Experiment.h: Change field type to Vector<Histable*>*.