[lua] Various fixes for Windurst 2-1, 8-2, 9-1, 9-2

[Nobutadas]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Windurst 2-1
Fixes event 166 missing inputs. Demotes several progressEvent to event
Capture by Siknoz: https://discord.com/channels/443544205206355968/443553403168358401/1109671523494666302

Windurst 8-2
Cutscene for event 22: https://youtu.be/9qupSLFklIU?t=2504
Cutscene for event 75: https://youtu.be/ihPyJkrhd7A?t=1926

Windurst 9-1
Removes trade item
Doesn't send a message special saying the key item was lost.
Capture by Wiggo: https://drive.google.com/open?id=1wjU5kOIDEy60Y7Hym2_CRvtKVD66S9yZ

Windurst 9-2
Correctly gates getting the 3 KI in the mission
Adds cutscene flags for event 3
Removes the KI when needed
Corrects two name misspellings
Capture by Wiggo: https://drive.google.com/open?id=15Mqd3b2VGRHsVWiklGy505zUabrB4vm-

Steps to test these changes

Add mission, set status, go to pos, test.