Update to Polkadot 0.9.26

[masapr]

Update to Polkadot 0.9.26 (all repos)

on branch

• Pallets
• Api-Client
• Parachain
• sgx-runtime
• integritee-node
• worker

on master

• Pallets

• Parachain

• sgx-runtime

• integritee-node

• worker

• new release integritee-node

Add new releases of integritee-node in worker CI

• docker
• build job

[clangenb]

I already did some work because I needed v0.9.26 for the teeracle testing:

• Pallets: polkadot v0.9.26 pallets#73 done, ready to merge after testing
• Api-client: run: diener upgrade --substrate --branch polkadot-v.9.26 && cargo update scs/substrate-api-client#264 done, will not be merged into master
• Parachain: polkadot v0.9.26 parachain#146, no need for you to do anything there, @echevrier will test it together with the teeracle deployment.

Please go ahead with sgx-runtime, integritee-node and the worker with the help of the team. :)

[masapr]

Everything was updated now, and runs green on the CI.

But:

• worker: I had to adjust the assertion here: https://github.com/integritee-network/worker/blob/sp/polkadot-v0.9.26/enclave-runtime/src/test/tests_main.rs#L434
  and I didn't understand, why this changed
• pallets: CI is green, but it doesn't compile in my setup. Also "cargo tree" shows in my setup a reference to polkadot-v0.9.24 for parentchain-test and I don't understand why. ... this doesn't happen on a clean checkout, so it should be fine

@clangenb should I get everything ready for the master anyway?

[clangenb]

Yes, please go ahead 👍