WASM32 - Replace mocked Identity client with real Identity client

[chrisgitiota]

The current POC implementation in bindings/wasm/src/kinesis uses a mocked _Identity Client_ used for test purposes located in
iota_sdk_abstraction/identity_client.rs

TODOs:

P1

• Replace currently used mocked "Identity Client" with IdentityClient located in rebased/client/full_client.rs
• If the mocked _Identity Client_ located in iota_sdk_abstraction/identity_client.rs shall be used for test purposes any longer, move the sources to an appropriate location. Otherwise, delete the sources.
• Make signer in WASM32 implementation non-owned again #1519
• Investigate/fix/workaround transaction execution finality #1520
• Remove "kinesis" wording from WASM code as well #1521

P2

• Make all transaction building functions and their traits async (similar to when creating identities or updating DID documents)
• Add support to get DID from an OnChainIdentity in TypeScript directly @wulfraem
  • aligned ts examples to use identity.didDocument().id(), which is basically what the Rust examples to
  • Update did fetching in wasm examples #1542
• remove IotaIdentityClient (Stardust related) @wulfraem
• remove last dummy types
• resolver client should be able to use read only and write capable client @wulfraem
• fix/check ci
• check for occurrences of "alias output" wording
• figure something out for the fn key_id(&self) -> &String in the signer

P3

• update readme
• fix warnings
• better example style (rust + wasm)
  • lower number examples should introduce a principle
  • higher number examples should re-use it (or use a helper function with the same content)
• update wiki?
• add synchronous contstructors, that throw an error and point to the asynchronous create functions for the two identity clients