[Consensus] Remove non-decoupled execution and refactor for cleaner interfaces

[sitalkedia]

Description

1. Decoupled execution is default - so simplify the code by removing non decoupled execution code path.
2. Remove the OrderedStateComputer and replace it with cleaner interface ExecutionClient. This provides a cleaner API for consensus to interact with pipelined execution.

Test Plan

Forge test and UTs

[trunk-io]

⏱️ 15h 13m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-unit-coverage	4h 17m	🟩
rust-smoke-coverage	3h 16m	🟩
windows-build	1h 25m	🟩 🟩 🟩 🟩
execution-performance / single-node-performance	1h 4m	🟩 🟩 🟩
rust-unit-tests	1h 2m	⬜ 🟩 ⬜ 🟩
rust-smoke-tests	1h 2m	🟩 ⬜ 🟩
rust-images / rust-all	35m	🟩 ⬜ 🟩
forge-compat-test / forge	29m	🟩 🟩
forge-e2e-test / forge	27m	🟩 🟩
rust-lints	21m	⬜ 🟩 ⬜ 🟩
run-tests-main-branch	20m	⬜ 🟥 ⬜ 🟥 🟥
cli-e2e-tests / run-cli-tests	18m	🟥 🟥
check	11m	⬜ 🟩 ⬜ 🟩
check-dynamic-deps	8m	🟩 🟩 🟩 🟩
general-lints	6m	⬜ 🟩 ⬜ 🟩
indexer-grpc-e2e-tests / test-indexer-grpc-docker-compose	4m	🟩 🟩
node-api-compatibility-tests / node-api-compatibility-tests	2m	🟩 🟩
semgrep/ci	2m	🟩 🟩 🟩 🟩
file_change_determinator	52s	🟩 🟩 🟩 🟩 🟩
file_change_determinator	35s	🟩 🟩 ⬜ 🟩
file_change_determinator	35s	🟩 🟩 🟩 🟩
execution-performance / file_change_determinator	28s	🟩 🟩 🟩
permission-check	15s	🟩 🟩 🟩 🟩 🟩
permission-check	14s	🟩 🟩 🟩 🟩 🟩
determine-docker-build-metadata	11s	🟩 🟩 🟩 🟩
upload-to-codecov	11s	🟩
permission-check	11s	🟩 🟩 🟩 🟩 🟩
permission-check	9s	🟩 🟩 🟩 🟩
permission-check	8s	🟩 🟩 🟩 🟩 🟩

🚨 1 job on the last run was significantly faster/slower than expected

Job	Duration	vs 7d avg	Delta
rust-images / rust-all	16m	13m

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[codecov]

Codecov Report

Attention: 273 lines in your changes are missing coverage. Please review.

Comparison is base (d771cec) 71.4% compared to head (dc83ecc) 69.8%.
Report is 6 commits behind head on main.

❗ Current head dc83ecc differs from pull request most recent head 26d59a2. Consider uploading reports for the commit 26d59a2 to get more accurate results

Files	Patch %	Lines
consensus/src/pipeline/execution_client.rs	4.8%	217 Missing ⚠️
consensus/src/epoch_manager.rs	47.0%	18 Missing ⚠️
consensus/src/test_utils/mock_execution_client.rs	87.0%	13 Missing ⚠️
consensus/src/consensus_provider.rs	0.0%	12 Missing ⚠️
consensus/src/test_utils/mock_state_computer.rs	57.1%	6 Missing ⚠️
consensus/src/recovery_manager.rs	0.0%	3 Missing ⚠️
consensus/src/block_storage/block_store.rs	94.5%	2 Missing ⚠️
consensus/src/dag/bootstrap.rs	80.0%	1 Missing ⚠️
consensus/src/twins/twins_node.rs	75.0%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #12104       +/-   ##
===========================================
- Coverage    71.4%    69.8%     -1.6%     
===========================================
  Files         810     2231     +1421     
  Lines      184821   419640   +234819     
===========================================
+ Hits       132005   293316   +161311     
- Misses      52816   126324    +73508     

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[github-actions]

✅ Forge suite compat success on aptos-node-v1.9.5 ==> 26d59a2f601ec96bf89e5cde0c13122b200e25ba

Compatibility test results for aptos-node-v1.9.5 ==> 26d59a2f601ec96bf89e5cde0c13122b200e25ba (PR)
1. Check liveness of validators at old version: aptos-node-v1.9.5
compatibility::simple-validator-upgrade::liveness-check : committed: 6578 txn/s, latency: 5067 ms, (p50: 4800 ms, p90: 8900 ms, p99: 10100 ms), latency samples: 230240
2. Upgrading first Validator to new version: 26d59a2f601ec96bf89e5cde0c13122b200e25ba
compatibility::simple-validator-upgrade::single-validator-upgrade : committed: 1613 txn/s, latency: 16943 ms, (p50: 17500 ms, p90: 22600 ms, p99: 23500 ms), latency samples: 83900
3. Upgrading rest of first batch to new version: 26d59a2f601ec96bf89e5cde0c13122b200e25ba
compatibility::simple-validator-upgrade::half-validator-upgrade : committed: 336 txn/s, submitted: 684 txn/s, expired: 347 txn/s, latency: 22568 ms, (p50: 13900 ms, p90: 54200 ms, p99: 57500 ms), latency samples: 27897
4. upgrading second batch to new version: 26d59a2f601ec96bf89e5cde0c13122b200e25ba
compatibility::simple-validator-upgrade::rest-validator-upgrade : committed: 2974 txn/s, latency: 10194 ms, (p50: 9600 ms, p90: 16800 ms, p99: 17800 ms), latency samples: 130880
5. check swarm health
Compatibility test for aptos-node-v1.9.5 ==> 26d59a2f601ec96bf89e5cde0c13122b200e25ba passed
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite realistic_env_max_load success on 26d59a2f601ec96bf89e5cde0c13122b200e25ba

two traffics test: inner traffic : committed: 7546 txn/s, latency: 5194 ms, (p50: 5000 ms, p90: 6300 ms, p99: 10800 ms), latency samples: 3260220
two traffics test : committed: 100 txn/s, latency: 2133 ms, (p50: 2000 ms, p90: 2400 ms, p99: 3700 ms), latency samples: 1780
Latency breakdown for phase 0: ["QsBatchToPos: max: 0.219, avg: 0.202", "QsPosToProposal: max: 0.447, avg: 0.399", "ConsensusProposalToOrdered: max: 0.567, avg: 0.522", "ConsensusOrderedToCommit: max: 0.463, avg: 0.443", "ConsensusProposalToCommit: max: 0.999, avg: 0.966"]
Max round gap was 1 [limit 4] at version 1504644. Max no progress secs was 6.137769 [limit 15] at version 1504644.
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Test runner output
• Test run is land-blocking