Add exact match check to use specified addon versions (#8478)

Fix exact addon version matching

Add exact match check before partial matching to prevent v1.7.7-eksbuild.2 from incorrectly matching v1.7.7-eksbuild.20.
Include test case with multi-digit version suffix.

Author: aoshi2000

pkg/actions/addon/addon.go

@@ -127,6 +127,10 @@ func (a *Manager) getLatestMatchingVersion(ctx context.Context, addon *api.Addon
 			return "", false, err
 		}
 
+		if addonVersion == *addonVersionInfo.AddonVersion {
+			return *addonVersionInfo.AddonVersion, addonVersionInfo.RequiresIamPermissions, nil
+		}
+
 		if addonVersion == "latest" || strings.Contains(*addonVersionInfo.AddonVersion, addonVersion) {
 			versions = append(versions, v)
 		}

pkg/actions/addon/update_test.go

@@ -85,6 +85,9 @@ var _ = Describe("Update", func() {
 						{
 							AddonVersion: aws.String("v1.0.0-eksbuild.2"),
 						},
+						{
+							AddonVersion: aws.String("v1.0.0-eksbuild.20"),
+						},
 					},
 				},
 			},