Regression 4.9.2 where aliased ECClassId switch from returning classId to className (backport #891) [release/4.9.x]

[mergify]

1. CTE query returning classid switch from className to classId in 4.9.x. This broke a user.
2. PR 7235 Fix CTE, but this requires properly handling extendType information. This result in another break in behavior where aliased classid property was return as className. In 4.8.x/ 4.9.0 it used to return Id not class name. This break only happens for Concurrent Query for ECSqlStatement was fine as it set a flag called DoNotConvertClassIdsToClassNamesWhenAliased to reproduce previous behavior.
3. This PR also set DoNotConvertClassIdsToClassNamesWhenAliased for concurrent query to reproduce behavior of classId returning class name when aliased to be compilable with 4.8.x

First query that broke user is following

SELECT t(aClassId) AS (SELECT ECClassId FROM Bis.Element) SELECT * FROM t
-- 4.8.x return className
-- 4.9.0 return classId

SELECT ECClassId AS aClassId FROM Bis.Element
--4.9.0 returned classId
--4.9.2 return className

After current fix

SELECT t(aClassId) AS (SELECT ECClassId FROM Bis.Element) SELECT * FROM t
-- return className as in 4.8.x

SELECT ECClassId AS aClassId FROM Bis.Element
-- returned classId  as in 4.8.x

itwinjs-core: iTwin/itwinjs-core#7282

---

This is an automatic backport of pull request #891 done by [Mergify](https://mergify.com).

[khanaffan]

/azp run imodel-native

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[DanRod1999]

/azp run imodel-native

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[DanRod1999]

linked PR was not on its own line in the PR description, so the regex didn't pick it up. I corrected it, and should be running fine now.