Fix the problem that the pseudo-terminal open event is not triggered

[zvzuola]

What it does

Fix the problem that the pseudo-terminal open event of the custom task is not triggered

How to test

1. install the following test extension task-provider-samples-0.0.1.vsix.zip (build form task-provider-sample)
2. Open any workspace and create a Rakefile empty file
3. Run task, and select "custombuildscript: 32 incremental" task to run
4. The pseudo-terminal open event is not triggered and the task is not running

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[vince-fugnitto]

Thank you for your contribution 👍

In order to accept your changes please be sure to sure to sign the eclipse contributor agreement (eca) with the same email as your authorship.

[vince-fugnitto]

@zvzuola are you still interested in contributing the fix?

[thegecko]

This issue is outlined in #11858 and as mentioned there, the fix may be to just revert #10780.

@arekzaluski I thought this had been resolved by you?

[thegecko]

Thanks @zvzuola, this should be fixed by reverting #10780 which I've done in #12098.

Closing this as superseded by the new PR.