fix(users): Allow accepting invites for org_admins

[ThisIsMani]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Currently accepting invites for org_admin will not work. This PR fixes it.

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

Closes #6254

How did you test it?

curl 'http://localhost:8080/user/accept_invite_from_email' \
  -H 'authorization: Bearer SPT with accept_invite_from_email' \
  --data-raw '{"token":"email token"}'

Response:

{
    "token": "JWT",
    "token_type": "user_info"
}

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

[semanticdiff-com]

Review changes with SemanticDiff.

Analyzed 6 of 6 files.

Overall, the semantic diff is 22% smaller than the GitHub diff.

	Filename	Status
✔️	crates/router/src/utils/user_role.rs	18.09% smaller
✔️	crates/router/src/db/kafka_store.rs	Analyzed
✔️	crates/router/src/db/user_role.rs	42.64% smaller
✔️	crates/router/src/core/user.rs	28.67% smaller
✔️	crates/router/src/core/user_role.rs	Analyzed
✔️	crates/diesel_models/src/query/user_role.rs	Analyzed

[racnan]

lets remove Entity type from email and use one Entity across repo.