update osg-qt from Qt4 tag to master branch(Qt5)

[ZgblKylin]

Describe the pull request

• What does this PR do?

  • Remove unused dependency of protobuf.

  • Update repo from tag Qt4 to latest master commit (Qt5 version).

• Which triplets are supported/not supported? Have you updated the CI baseline?

  • Support all triplets for previous version.

• Does your PR follow the maintainer guide?

  • Yes

[JackBoosY]

cc @Neumann-A for review this PR.

[ZgblKylin]

@Neumann-A pipeline job x64_windows_static was abandoned with the output:

This job was abandoned. We have detected that logs from the agent may have not finished uploading. We have included our in-memory record of all log lines uploaded before we lost contact with the agent:

How to restart the job?

[JackBoosY]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[JackBoosY]

@ZgblKylin Sorry for late, can you please merge your branch with master?

[ZgblKylin]

@JackBoosY Sorry for late, I've rebased this branch onto master, and fixed baseline version (from Qt4#3 to Qt5#4)

Moreover, I've tried migrate to manifest file, which failes in pipeline Create Diff

[BillyONeal]

Thanks for your contribution!