sendInput doesn't seem to work in multipleActions

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### Windows Terminal version

1.15.1863.0

### Windows build number

10.0.22824.0

### Other Software

_No response_

### Steps to reproduce

I'm attempting to open a new tab and then send input in that new tab using the `multipleActions` command.

```
{
"command":
{
"action": "multipleActions",
"actions": [
{
"action": "newTab"
},
{
"action": "sendInput",
"input": "\u001b[A"
}
]
},
"name": "Send Input Test"
},
```

### Expected Behavior

The new tab should have the input sent from `sendInput`, which in this case is as if I pressed the up arrow in my buffer.

### Actual Behavior

`sendInput` seems to be completely ignored and my input line is empty.

Start by tracing how the multipleActions command processes the newTab and sendInput actions, using the provided JSON reproduction. Verify that input is delivered to the newly opened tab and run the relevant existing tests, if found, to confirm the up-arrow input is no longer ignored.

Written by the indexing model from the issue text.