Enable chain sealing by default

[AhmedSoliman]

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• Remove more unnecessary async #3850
• [invoker] removing unnecessary async on action handling #3849
• Remove deprecated fields in WAL header #3848
• Partition-driven trimming is now the default #3847
• -> Enable chain sealing by default #3846

[github-actions]

Test Results

  7 files  ± 0    7 suites  ±0   5m 10s ⏱️ + 1m 8s
 49 tests  -  5   49 ✅  -  4  0 💤  - 1  0 ❌ ±0 
210 runs   - 13  210 ✅  - 10  0 💤  - 3  0 ❌ ±0 

Results for commit 1f29ae5. ± Comparison against base commit 9061492.

This pull request removes 6 and adds 1 tests. Note that renamed tests count towards both.

dev.restate.sdktesting.tests.Ingress ‑ idempotentInvokeSend(Client)
dev.restate.sdktesting.tests.Ingress ‑ idempotentInvokeService(Client)
dev.restate.sdktesting.tests.Ingress ‑ idempotentInvokeVirtualObject(URI, Client)
dev.restate.sdktesting.tests.Ingress ‑ idempotentSendThenAttach(Client)
dev.restate.sdktesting.tests.Ingress ‑ idempotentSendThenAttachWIthIdempotencyKey(Client)
dev.restate.sdktesting.tests.PrivateService ‑ privateService(URI, Client)

dev.restate.sdktesting.tests.RunRetry ‑ executedOnlyOnce(Client)

♻️ This comment has been updated with latest results.

[tillrohrmann]

Great that we'll have chain sealing enabled by default with 1.6 :-) LGTM. +1 for merging!