Fix getCompletionItemActions add nil checks for symbol origin data

[Twacqwq]

Temporary symbols/Literal Syntax Sugar (e.g., []., (class {}).) have no origin data - I just want to check if they're nil and skip processing if so.

Fixes #1950

[jakebailey]

Did you happen to come up with a test case for this?

[Twacqwq]

Did you happen to come up with a test case for this?

I can think of two test cases, but I'm not sure where to place them in the test/ directory.

[jakebailey]

You'd want to put them in https://github.com/microsoft/typescript-go/tree/main/internal/fourslash/tests as another fourslash test.

[Twacqwq]

You'd want to put them in https://github.com/microsoft/typescript-go/tree/main/internal/fourslash/tests as another fourslash test.

Thanks. I'll update it soon.