feat: Shifted thhe manual creation of license to the automated creation

[devlopharsh]

fixes: #3842

Summary

• Added config flag license.manual.creation.enabled (default false) to control manual license creation.
• Blocked manual creation and implicit auto-creation when disabled, with clear LicenseDB sync message.
• Added deprecation warning header on create responses.
• Updated REST docs and tests to match new behavior.

Configuration :

• Added new key : license.manual.creation.enabled .
• kept the manual creation false at defaullt.

Testing :

mvn -Dbase.deploy.dir="d:\open\sw-360\sw360\target\deploy" -pl rest/resource-server -am test -Dtest=LicenseSpecTest -Dsurefire.failIfNoSpecifiedTests=false

mvn -Dbase.deploy.dir="d:\open\sw-360\sw360\target\deploy" -pl rest/resource-server -am test -Dtest=LicenseTest -Dsurefire.failIfNoSpecifiedTests=false

mvn -Dbase.deploy.dir="d:\open\sw-360\sw360\target\deploy" -pl libraries/datahandler -am test -Dsurefire.failIfNoSpecifiedTests=false

checks :

• Config flag added with default/validation
• REST endpoints respect flag
• Deprecation warning added
• Docs updated
• Tests updated and passing

[devlopharsh]

@GMishx @ADITYA-CODE-SOURCE
i have to discuss some changes also regarding the PR as :

1. UI update : we also need to Hide/disable Create License and show Use LicenseDB sync message when manual creation is disabled.
2. Client integrations : Any scripts or integrations calling POST /api/licenses will now receive 403 by default unless license.manual.creation.enabled=true.

Please have a review over the pr and let me know about further changes needed .

[ADITYA-CODE-SOURCE]

@GMishx @ADITYA-CODE-SOURCE i have to discuss some changes also regarding the PR as :

1. UI update : we also need to Hide/disable Create License and show Use LicenseDB sync message when manual creation is disabled.
2. Client integrations : Any scripts or integrations calling POST /api/licenses will now receive 403 by default unless license.manual.creation.enabled=true.

Please have a review over the pr and let me know about further changes needed .

Thanks for the PR @devlopharsh. A few concerns:

1. Breaking change: Default false will break all existing license creation workflows. Should default to true.
2. Missing dependency: This PR references "sync from LicenseDB" but that endpoint (/api/license-db/sync) only exists after PR feat(config): Add LicenseDB connection configuration properties #3686 is merged. The message will confuse users on current main.
3. Suggestion:
   • Change default to true
   • Make the error message conditional: if LicenseDB is enabled, show sync message; otherwise show generic message
   • Or wait for PR feat(config): Add LicenseDB connection configuration properties #3686 to merge first
     Also, the PR title says "automated license creator" but the implementation disables manual creation - consider renaming for clarity.