Wasm: Bump wasmtime to 44.0.2 + 45.0.0

[ggreif]

Closes compiler-explorer/compiler-explorer#8706.

Adds 44.0.2 and 45.0.0 to the wasmtime targets in bin/yaml/wasm.yaml:

• 44.0.2 — security backport addressing GHSA-2r75-cxrj-cmph (WASI path_open(TRUNCATE) bypasses FilePerms::WRITE). CE doesn't expose WASI filesystem permissions to user code, so the advisory isn't exploitable here, but no reason to ship the vulnerable patchlevel. Picked over 44.0.1.
• 45.0.0 — the next major. Notable for CE users: includes bytecodealliance/wasmtime#13343, a cranelift mid-end optimization producing strictly tighter wasm-instruction lowering for ctz/clz-in-boolean-context patterns across all four backends (x86_64 / aarch64 / riscv64 / s390x). The pattern is common in wasm emitted by frontends doing LSB→ctz peepholes (e.g. Motoko's moc after binaryen's -Os).
• Upstream release notes: https://github.com/bytecodealliance/wasmtime/blob/v45.0.0/RELEASES.md