Add error message to inform user of maximum characters limit reached on "Check availability"

[vickyszuchin]

Issue description

Currently, it is unclear to user when they have reached the max characters limit on "Check availability". The error display is misleading.

Input string: aqwsderfgtyhjuiklopmnbvxzsdfghjjythgfhgfhfgsdfsdfsdgdgfhfgdgdgfdgfhgfhgfhgf

Acceptance criteria

• Add new error message to inform user of max characters allowed has been reached
• Make sure that the error message is consistent with other max character messages in application
• Make sure to check what is allowed by epp
• Work with design team on message wording

Additional context

Identified in pre-launch testing. See issues

Links to other issues

Related to #1689, #1691, #1692

[vickyszuchin]

This issue has been sized and meets DoR criteria. Moving to "Ready".