Add WASIp3 support (#3272) * update Wasmtime dep to `release-37.0.0` v37.0.0 will be released later this month; this is a draft based on the Git branch for that release so we're ready when the release happens. Closes #3270 Signed-off-by: Joel Dice * update Rust version to 1.87 This is required by Wasmtime 37. Signed-off-by: Joel Dice * update Wasmtime dep in `spin-timer` example Signed-off-by: Joel Dice * restore accidentally-removed `wasi::io::error::add_to_linker` call Signed-off-by: Joel Dice * Add WASIp3 support This adds wasi:{cli,clocks,filesystem,http,random,sockets}@0.3.0-rc-2025-08-15 support, including inbound and outbound HTTP requests. I've smoke tested this manually with a few WASIp3 components and plan to port over some or all of the existing WASIp2 tests. TODO: - Port wasi:http@0.2.x tests - Add `Instrument::in_current_span` calls where necessary (e.g. in wasip3.rs) - Update to next release candidate once the `release-37.0.0` branch supports it - Switch to the final 37.0.0 release once it's available Signed-off-by: Joel Dice * reduce trigger-http p2 and p3 code duplication Signed-off-by: Joel Dice * add todo comments and change more bails to unreachables Signed-off-by: Joel Dice * add WASIp3 port of `wasi-http-streaming` test This required adding the 0.3.0-rc-2025-08-15 WIT files to the tree so `wit-bindgen` could use them. I've also addressed Till's feedback to match only the exact 0.3.0 RC we support when looking for the `wasi:http/handler` export. Finally, this includes a temporary workaround for https://github.com/bytecodealliance/wasmtime/issues/11703, which was uncovered by the streaming test added in this commit. Signed-off-by: Joel Dice * update `wit-bindgen` version for test components Signed-off-by: Joel Dice * update to latest Wasmtime 37 and WASIp3 snapshots Signed-off-by: Joel Dice * update to Wasmtime v37.0.1 Signed-off-by: Joel Dice * add `Instrument::in_current_span` call to spawned future Signed-off-by: Joel Dice * whitespace tweak per review feedback Signed-off-by: Joel Dice * explain reason for ignoring `fut` param in `InstanceState::send_request` Signed-off-by: Joel Dice --------- Signed-off-by: Joel Dice

Update to Wasmtime v37.0.0 #3270

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