Bump teaclave-sdk to v1.1.6-testing

[Kailai-Wang]

Upstream PR is almost ready: https://github.com/integritee-network/worker/pull/1076

We'll need to:

• update upstream code to this revision once it's merged
• included the rust toolchain (included in last step) and remove the patched substrate dependencies
• check if we need to update any other SDK on tee-server (intel SDK?)

An upgrade to v0.9.29 can be expected very soon

[Kailai-Wang]

It's merged now.