Disallow certain characters in first and last name on creation of invitation and creation of guest

When a sponsor creates a new guest invitation, and when a guest corrects their name they must now use transcribed characters.

frontend/src/routes/guest/register/steps/register.test.tsx

@@ -194,7 +194,7 @@ test('Gender required to be set if gender field is showing', async () => {
 
   const formData: GuestRegisterData = {
     firstName: 'Test',
-    lastName: 'Test2',
+    lastName: 'TestTwo',
     mobilePhoneCountry: 'NO',
     mobilePhone: '97543980',
     nationalIdNumber: '',
@@ -249,7 +249,7 @@ test('Gender not required to be set if gender field is not showing', async () =>
 
   const formData: GuestRegisterData = {
     firstName: 'Test',
-    lastName: 'Test2',
+    lastName: 'TestTwo',
     mobilePhoneCountry: 'NO',
     mobilePhone: '97543980',
     nationalIdNumber: '',
@@ -297,7 +297,7 @@ test('Guest not allowed to proceed in wizard if phone number is not valid', asyn
 
   const formData: GuestRegisterData = {
     firstName: 'Test',
-    lastName: 'Test2',
+    lastName: 'TestTwo',
     mobilePhoneCountry: 'NO',
     mobilePhone: '50',
     nationalIdNumber: '',
@@ -341,7 +341,7 @@ test('Guest allowed to proceed in wizard if data is valid', async () => {
 
   const formData: GuestRegisterData = {
     firstName: 'Test',
-    lastName: 'Test2',
+    lastName: 'TestTwo',
     mobilePhoneCountry: 'NO',
     mobilePhone: '97543992',
     nationalIdNumber: '',
@@ -391,7 +391,7 @@ test('Default country code gets set in form values', async () => {
   // be populated with a default value
   const formData: GuestRegisterData = {
     firstName: 'Test',
-    lastName: 'Test2',
+    lastName: 'TestTwo',
     mobilePhoneCountry: '',
     mobilePhone: '97543992',
     nationalIdNumber: '',
@@ -441,7 +441,7 @@ test('Foreign country code gets set in form values', async () => {
 
   const formData: GuestRegisterData = {
     firstName: 'Test',
-    lastName: 'Test2',
+    lastName: 'TestTwo',
     mobilePhoneCountry: '',
     mobilePhone: '3892778472',
     nationalIdNumber: '',