Getting 404 for /authenticationendpoint/device_success.do

[shashimalcse]

Describe the issue:
When attempting to login with device code grant, the /authenticationendpoint/device_success.do endpoint is returning a 404 (Not Found) error.

How to reproduce:
Try device flow

Expected behavior:
The endpoint should return a successful response for successful login.

Environment information (Please complete the following information; remove any unnecessary fields) :

• Product Version: IS 7.0.0
• OS: Mac
• Database: H2

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[shashimalcse]

bug was introduced by this PR that used an invalid JSP file. : https://github.com/wso2-support/identity-apps/pull/490
Fix : wso2/identity-apps#6907