Bump Wasmtime to 18.0.0

[wasmtime-publish]

This is an automated pull request from CI which indicates
that the next release-17.0.0 branch has been created and
the main branch is getting its version number bumped from 17.0.0 to
18.0.0.

Maintainers should take a moment to review the release
notes for 17.0.0, and if any changes are necessary send
PRs to the main branch to update RELEASES.md and then backport
these PRs to the release branch.

Maintainers should also review that aarch64-apple-darwin builds
are passing via embark's CI.

Another automated PR will be made in roughly 2 weeks time when for
the actual release itself.

If any issues arise on the main branch before the release is made
then the issue should first be fixed on main and then backported
to the release-17.0.0 branch.

[github-actions]

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cc @cfallin, @fitzgen, @peterhuene, @saulecabrera

Details

This issue or pull request has been labeled: "cranelift", "cranelift:meta", "cranelift:module", "cranelift:wasm", "isle", "wasmtime:c-api", "wasmtime:docs", "winch"

Thus the following users have been cc'd because of the following labels:

• cfallin: isle
• fitzgen: isle
• peterhuene: wasmtime:c-api
• saulecabrera: winch

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