Cloud migration: upload snapshot files using presigned url (#90273)

* Cloud migration: upload snapshot files using presigned url

* log error if index file cannot be closed

* log error if file cannot be closed in uploadUsingPresignedURL

pkg/services/cloudmigration/gmsclient/gms_client_test.go

@@ -0,0 +1,36 @@
+package gmsclient
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_buildBasePath(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		description string
+		domain      string
+		clusterSlug string
+		expected    string
+	}{
+		{
+			description: "domain starts with http://localhost, should return domain",
+			domain:      "http://localhost:8080",
+			clusterSlug: "anything",
+			expected:    "http://localhost:8080",
+		},
+		{
+			description: "domain doesn't start with http://localhost, should build a string using the domain and clusterSlug",
+			domain:      "gms-dev",
+			clusterSlug: "us-east-1",
+			expected:    "https://cms-us-east-1.gms-dev/cloud-migrations",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.description, func(t *testing.T) {
+			assert.Equal(t, tt.expected, buildBasePath(tt.domain, tt.clusterSlug))
+		})
+	}
+}