Fix abi diffing to incporporate changes in type graphs.

We now need to convert from type ids to type names while adding a diff
message, since types don't have type names as references anymore.

Bug: 71486971

Test: tests/test.py test updation CL; all tests pass.

Test: tests/gen_all.py; manually diff between libcpp_gold.so.lsdump and
      libcpp_gold_member_diff.so.lsdump, diff is visually the same as
      before.

Test: build android source tree for aosp_arm64_ab; create reference
      dumps; rebuild; confirm no errors or warnings.

Change-Id: I17a3a1a02c5c2312e543a930ae3a1d9037e683b8