[clang] [clang][Dependency Scanning] Refactor Scanning Compiler Instance Initialization (PR #161300)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-arm-ubuntu` running on `linaro-lldb-arm-ubuntu` while building `clang` at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/18/builds/21701

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test) failure: build (failure)
...
PASS: lldb-unit :: Core/./LLDBCoreTests/98/470 (2457 of 3716)
PASS: lldb-unit :: Core/./LLDBCoreTests/99/470 (2458 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/1/76 (2459 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/0/76 (2460 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/12/76 (2461 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/13/76 (2462 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/14/76 (2463 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/15/76 (2464 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/16/76 (2465 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/17/76 (2466 of 3716)
FAIL: lldb-unit :: DAP/./DAPTests/10/76 (2467 of 3716)
******************** TEST 'lldb-unit :: DAP/./DAPTests/10/76' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb/unittests/DAP/./DAPTests-lldb-unit-519352-10-76.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=76 GTEST_SHARD_INDEX=10 /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb/unittests/DAP/./DAPTests
--

Script:
--
/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb/unittests/DAP/./DAPTests --gtest_filter=DisconnectRequestHandlerTest.DisconnectTriggersTerminateCommands
--
../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:51: Failure
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("1\n")))...
         Expected: to be called once
           Actual: never called - unsatisfied and active

../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:52: Failure
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("2\n")))...
         Expected: to be called twice
           Actual: called once - unsatisfied and active


../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:51
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("1\n")))...
         Expected: to be called once
           Actual: never called - unsatisfied and active

../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:52
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("2\n")))...
         Expected: to be called twice
           Actual: called once - unsatisfied and active



********************
PASS: lldb-unit :: DAP/./DAPTests/11/76 (2468 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/18/76 (2469 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/19/76 (2470 of 3716)
PASS: lldb-unit :: DAP/./DAPTests/20/76 (2471 of 3716)

```

</details>

https://github.com/llvm/llvm-project/pull/161300