rebase: Bump github.com/onsi/gomega from 1.27.4 to 1.27.6

Bumps [github.com/onsi/gomega](https://github.com/onsi/gomega) from 1.27.4 to 1.27.6.
- [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/v1.27.4...v1.27.6)

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

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

vendor/github.com/onsi/gomega/matchers/consist_of.go

@@ -48,11 +48,13 @@ func neighbours(value, matcher interface{}) (bool, error) {
 
 func equalMatchersToElements(matchers []interface{}) (elements []interface{}) {
 	for _, matcher := range matchers {
-		equalMatcher, ok := matcher.(*EqualMatcher)
-		if ok {
-			matcher = equalMatcher.Expected
+		if equalMatcher, ok := matcher.(*EqualMatcher); ok {
+			elements = append(elements, equalMatcher.Expected)
+		} else if _, ok := matcher.(*BeNilMatcher); ok {
+			elements = append(elements, nil)
+		} else {
+			elements = append(elements, matcher)
 		}
-		elements = append(elements, matcher)
 	}
 	return
 }
@@ -72,11 +74,13 @@ func flatten(elems []interface{}) []interface{} {
 
 func matchers(expectedElems []interface{}) (matchers []interface{}) {
 	for _, e := range flatten(expectedElems) {
-		matcher, isMatcher := e.(omegaMatcher)
-		if !isMatcher {
-			matcher = &EqualMatcher{Expected: e}
+		if e == nil {
+			matchers = append(matchers, &BeNilMatcher{})
+		} else if matcher, isMatcher := e.(omegaMatcher); isMatcher {
+			matchers = append(matchers, matcher)
+		} else {
+			matchers = append(matchers, &EqualMatcher{Expected: e})
 		}
-		matchers = append(matchers, matcher)
 	}
 	return
 }
@@ -89,9 +93,14 @@ func presentable(elems []interface{}) interface{} {
 	}
 
 	sv := reflect.ValueOf(elems)
-	tt := sv.Index(0).Elem().Type()
+	firstEl := sv.Index(0)
+	if firstEl.IsNil() {
+		return elems
+	}
+	tt := firstEl.Elem().Type()
 	for i := 1; i < sv.Len(); i++ {
-		if sv.Index(i).Elem().Type() != tt {
+		el := sv.Index(i)
+		if el.IsNil() || (sv.Index(i).Elem().Type() != tt) {
 			return elems
 		}
 	}