Examples: Refresh rofl-oracle-sgx and rofl-oracle-tdx-raw

[matevz]

Fixes #2090

This PR rewrites the rofl-oracle-* examples to a new format:

• name rofl-oracle-sgx for SGX and rofl-oracle-tdx-raw for TDX flavor without containers
• introduce rofl.yaml
• in the Rust code, use the rofl_core app's id() and trust_root() implementation
• rofl-oracle-sgx: use debug: true for Localnet and no trust root
• update Testnet trust roots to more recent ones
• rename rofl-oracle-*/oracle -> rofl-oracle-*/contracts because that's where web3 devs expect smart contracts to live in
• add symlink from rofl-oracle-tdx-raw/contracts -> rofl-oracle-sgx/contracts to avoid code duplication
• add CI for building rofl-oracle-* examples
• update Cargo.toml files to use the current oasis-sdk repo tooling, including the minimal-runtime example
• bump deps in rofl-utils used by rofl-oracle-sgx

Related oasisprotocol/oasis-web3-gateway#759, oasisprotocol/cli#548

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.96%. Comparing base (68c1c17) to head (cad37c4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2273   +/-   ##
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  Coverage   53.96%   53.96%           
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  Files         163      163           
  Lines       12333    12333           
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  Hits         6656     6656           
  Misses       5677     5677           

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