Rename TokenTypeCapsule to TokenTypeComplex

[jpogran]

This renames the existing token type TokenTypeCapsule to TokenTypeComplex to aid readability and reflect existing naming conventions.

This token represents list in type = list(string) and similar, i.e. the name of the complex type. The term "capsule" has slightly different meaning in cty and HCL and we should not use it in this context.

Pending hashicorp/hcl-lang#352

[radeksimko]

I know this is still a draft but just FYI we'll also need to update the docs here

[radeksimko]

LGTM, but would you mind also drafting a PR in vscode-terraform, just to ensure we don't forget about it, prior to merging?

[jpogran]

LGTM, but would you mind also drafting a PR in vscode-terraform, just to ensure we don't forget about it, prior to merging?

Already prepped, waiting for this to merge

[radeksimko]

I can't see the PR in the list but I'm happy as long as you confirmed that it's in the queue and you confirmed it's working on the client. 😄

Feel free to merge then.

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