wasi-nn: update openvino crate, use external CI action (#4383)

* ci: replace OpenVINO installer action

To test wasi-nn, we currently use an OpenVINO backend. The Wasmtime CI
must install OpenVINO using a custom GitHub action. This CI action has
not been updated in some time and in the meantime OpenVINO (and the
OpenVINO crates) have released several new versions.
https://github.com/abrown/install-openvino-action is an external action
that we plan to keep up to date with the latest releases. This change
replaces the current CI action with that one.

* wasi-nn: upgrade openvino dependency to v0.4.1

This eliminates a `lazy_static` dependency and changes a few parameters
to pass by reference. Importantly, it enables support for the latest
versions of OpenVINO (v2022.*) in wasi-nn.

* ci: update wasi-nn script to source correct env script

* ci: really use the correct path for the env script

Also, clarify which directory OpenVINO is installed in (the symlink may
not be present).

.github/actions/install-openvino/.gitignore

@@ -1,2 +0,0 @@
-CHECKSUM
-GPG-PUB-KEY*

.github/actions/install-openvino/README.md

@@ -1,8 +0,0 @@
-# install-openvino
-
-A GitHub action to install OpenVINO from a package repository. This is only necessary for `wasi-nn` support but there
-are enough steps here to package the functionality separately and avoid cluttering the CI.
-
-Future improvements:
- - make this installer work for different OS/distributions (e.g. https://docs.openvinotoolkit.org/latest/openvino_docs_install_guides_installing_openvino_windows.html)
- - it would be nice to output the install directory (i.e. `/opt/intel/openvino`)

.github/actions/install-openvino/action.yml

@@ -1,13 +0,0 @@
-name: 'Install OpenVINO'
-description: 'Install OpenVINO binaries from a package repository; this is significantly faster than building from source'
-
-inputs:
-  version:
-    description: 'The release version of OpenVINO to install'
-    required: false
-
-runs:
-  using: composite
-  steps:
-    - run: ${{ github.action_path }}/install.sh ${{ inputs.version }}
-      shell: bash

.github/actions/install-openvino/install.sh

@@ -1,40 +0,0 @@
-#!/bin/bash
-
-set -e
-
-# Determine the OpenVINO version to install from the first parameter. Also, split out the parts of
-# this version; `${version_parts[0]}` should contain the year. E.g.:
-#  version=2021.4.752
-#  version_year=2021
-if [ "$#" -ne 1 ]; then
-    version="2021.4.752"
-else
-    version="$1"
-fi
-IFS='.' read -ra version_parts <<< "$version"
-version_year="${version_parts[0]}"
-
-# Determine the OS name and version (Linux-specific for now). E.g.:
-#  os_name=ubuntu
-#  os_version=20.04
-#  os_version_year=20
-eval $(source /etc/os-release; echo os_name="$ID"; echo os_version="$VERSION_ID";)
-IFS='.' read -ra os_version_parts <<< "$os_version"
-os_version_year="${os_version_parts[0]}"
-
-# Determine the directory of this script. E.g.:
-#  script_dir=/some/directory
-scriptdir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Retrieve the OpenVINO checksum.
-curl -sSL https://apt.repos.intel.com/openvino/$version_year/GPG-PUB-KEY-INTEL-OPENVINO-$version_year > $scriptdir/GPG-PUB-KEY-INTEL-OPENVINO-$version_year
-echo "5f5cff8a2d26ba7de91942bd0540fa4d $scriptdir/GPG-PUB-KEY-INTEL-OPENVINO-$version_year" > $scriptdir/CHECKSUM
-md5sum --check $scriptdir/CHECKSUM
-
-# Add the OpenVINO repository (DEB-specific for now).
-sudo apt-key add $scriptdir/GPG-PUB-KEY-INTEL-OPENVINO-$version_year
-echo "deb https://apt.repos.intel.com/openvino/$version_year all main" | sudo tee /etc/apt/sources.list.d/intel-openvino-$version_year.list
-sudo apt update
-
-# Install the OpenVINO package.
-sudo apt install -y intel-openvino-runtime-$os_name$os_version_year-$version