[TM-279] Remove and update CREATE_ACCOUNT and CREATE_CONTRACT

Description

• Remove CREATE_ACCOUNT because it's removed in Babylon.
• Update CREATE_CONTRACT according to the changes in Babylon.
• Update tezos_examples contracts.
• Add missing variable annotations to make new tests pass.

Related issue(s)

https://issues.serokell.io/issue/TM-279

✅ Checklist for your Merge Request

Related changes (conditional)

• Tests (see short guidelines)

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

• Documentation

  • I checked whether I should update the docs and did so if necessary:
    • README
    • Haddock
    • docs/

Stylistic guide (mandatory)

• My commits comply with the following policy.
• My code complies with the style guide.