rebase: bump github.com/onsi/gomega from 1.17.0 to 1.18.0

Bumps [github.com/onsi/gomega](https://github.com/onsi/gomega) from 1.17.0 to 1.18.0.
- [Release notes](https://github.com/onsi/gomega/releases)
- [Changelog](https://github.com/onsi/gomega/blob/master/CHANGELOG.md)
- [Commits](https://github.com/onsi/gomega/compare/v1.17.0...v1.18.0)

---
updated-dependencies:
- dependency-name: github.com/onsi/gomega
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/onsi/gomega/internal/gutil/post_ioutil.go

@@ -0,0 +1,48 @@
+//go:build go1.16
+// +build go1.16
+
+// Package gutil is a replacement for ioutil, which should not be used in new
+// code as of Go 1.16. With Go 1.16 and higher, this implementation
+// uses the ioutil replacement functions in "io" and "os" with some
+// Gomega specifics. This means that we should not get deprecation warnings
+// for ioutil when they are added.
+package gutil
+
+import (
+	"io"
+	"os"
+)
+
+func NopCloser(r io.Reader) io.ReadCloser {
+	return io.NopCloser(r)
+}
+
+func ReadAll(r io.Reader) ([]byte, error) {
+	return io.ReadAll(r)
+}
+
+func ReadDir(dirname string) ([]string, error) {
+	entries, err := os.ReadDir(dirname)
+	if err != nil {
+		return nil, err
+	}
+
+	var names []string
+	for _, entry := range entries {
+		names = append(names, entry.Name())
+	}
+
+	return names, nil
+}
+
+func ReadFile(filename string) ([]byte, error) {
+	return os.ReadFile(filename)
+}
+
+func MkdirTemp(dir, pattern string) (string, error) {
+	return os.MkdirTemp(dir, pattern)
+}
+
+func WriteFile(filename string, data []byte) error {
+	return os.WriteFile(filename, data, 0644)
+}

vendor/github.com/onsi/gomega/internal/gutil/using_ioutil.go

@@ -0,0 +1,47 @@
+//go:build !go1.16
+// +build !go1.16
+
+// Package gutil is a replacement for ioutil, which should not be used in new
+// code as of Go 1.16. With Go 1.15 and lower, this implementation
+// uses the ioutil functions, meaning that although Gomega is not officially
+// supported on these versions, it is still likely to work.
+package gutil
+
+import (
+	"io"
+	"io/ioutil"
+)
+
+func NopCloser(r io.Reader) io.ReadCloser {
+	return ioutil.NopCloser(r)
+}
+
+func ReadAll(r io.Reader) ([]byte, error) {
+	return ioutil.ReadAll(r)
+}
+
+func ReadDir(dirname string) ([]string, error) {
+	files, err := ioutil.ReadDir(dirname)
+	if err != nil {
+		return nil, err
+	}
+
+	var names []string
+	for _, file := range files {
+		names = append(names, file.Name())
+	}
+
+	return names, nil
+}
+
+func ReadFile(filename string) ([]byte, error) {
+	return ioutil.ReadFile(filename)
+}
+
+func MkdirTemp(dir, pattern string) (string, error) {
+	return ioutil.TempDir(dir, pattern)
+}
+
+func WriteFile(filename string, data []byte) error {
+	return ioutil.WriteFile(filename, data, 0644)
+}