[SHDOCW] Check ClearExtensionRecordsBlockReason stub

(tracking MS mshtml.dll tests)

When calling for activex plugins, it calls ClearExtensionRecordsBlockReason, but even though the stub is defined on https://github.com/reactos/reactos/blob/4c4e341d9237509d504c5d505814b9f06d0b8ed0/dll/win32/shdocvw/shdocvw.spec#L128

it complains for the missing stub:

WARNING: calling stub ClearExtensionRecordsBlockReason()
Unhandled exception
ExceptionCode: 80000100
Missing function: shdocvw.dll!ClearExtensionRecordsBlockReason
CS:EIP 1b:7505977a
DS 23 ES 23 FS 3b GS 0
EAX: 00000004 EBX: 7ffde000 ECX: 0012f5ac
EDX: 00000000 EBP: 0012f600 ESI: 0012fe38 ESP: 0012f5a4
EDI: 0012f600 EFLAGS: 00000206
Address:
<SHDOCVW.dll:1977a> (C:\ReactOS\System32\SHDOCVW.dll@75040000)
Frames:
<mshtml.dll:1ba849> (C:\ReactOS\System32\mshtml.dll@498e0000)

Tested with Trident dlls and IPES from https://jira.reactos.org/browse/CORE-20001

(potentially a different callign convention?)