[llvm] Reland "[ThinLTO][Bitcode] Generate import type in bitcode" (PR #97253)

[Mingming Liu via llvm-commits]

minglotus-6 wrote:

The pre-commit buildbot failure is irrelevant

```
 cat github-pull-requests_build_79148_linux-linux-x64.log | grep -B 10 -A 10  "Failed Tests "
[0.70s,0.80s) :: [                                        ] :: [  3/442]
[0.60s,0.70s) :: [                                        ] :: [  2/442]
[0.50s,0.60s) :: [                                        ] :: [ 10/442]
[0.40s,0.50s) :: [                                        ] :: [  9/442]
[0.30s,0.40s) :: [*                                       ] :: [ 22/442]
[0.20s,0.30s) :: [*************                           ] :: [151/442]
[0.10s,0.20s) :: [****************                        ] :: [183/442]
[0.00s,0.10s) :: [*****                                   ] :: [ 61/442]
--------------------------------------------------------------------------
********************
Failed Tests (1):
  BOLT :: X86/reader-stale-yaml-std.test


Testing Time: 2.55s

Total Discovered Tests: 454
  Skipped          :   7 (1.54%)
  Unsupported      :  13 (2.86%)
  Passed           : 431 (94.93%)
  Expectedly Failed:   2 (0.44%)
```

https://github.com/llvm/llvm-project/pull/97253