refactor: prune unused semi-colons #36268

Enable -Wextra-semi and delete all the redundant semicolons.

Waiting on a pull of the libmultiprocess subtree.

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External sites

• Code coverage & benchmarks: https://corecheck.dev/bitcoin/bitcoin/pulls/36268
• Ralph review <img src=https://review.fish.foo/assets/bitcoin/bitcoin/36268.png alt="Ralph review status"> https://git.fish.foo/bitcoin/bitcoin/pulls/36268#author-ralph

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Reviews

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Conflicts

Reviewers, this pull request conflicts with the following ones:

• #36598 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/36598.svg">} ([Demo] validation: remove AssumeUTXO by l0rinc)
• #36572 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/36572.svg">} (ipc: hold event loop references when using it in CapnpProtocol by xyzconstant)
• #36167 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/36167.svg">} ([RFC] Enable -Wunused by fanquake)
• #35387 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/35387.svg">} (logging: make trace logging easily usable by ryanofsky)
• #35355 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/35355.svg">} (Use atomics for determining whether trace logging is enabled by ajtowns)
• #35302 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/35302.svg">} (Silent Payments: Sending (take 2) by Eunovo)
• #34909 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/34909.svg">} (wallet, refactor: modularise wallet by extracting out legacy wallet migration by rkrux)
• #34038 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/34038.svg">} (logging: replace -loglevel with -trace, expose trace logging via RPC by ajtowns)
• #31507 _{<img src="https://drahtbot.space/ack_count/bitcoin/bitcoin/31507.svg">} (build: Use clang-cl to build on Windows natively by hebasto)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

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🚧 At least one of the CI tasks failed. _{Task lint: https://github.com/bitcoin/bitcoin/actions/runs/35082380885/job/104749176904} _{LLM reason (✨ experimental): CI failed the lint “subtree” check because a subtree directory was modified without a corresponding subtree merge.}

<details><summary>Hints</summary>

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

• Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.

• A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.

• An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

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