Update group/project access email to include reference to Organization

Problem

For Organizations on Cells 1.0, we want to maintain the functionality that group and project Owners can invite members to groups or projects. Doing so would add the user as a member to the respective group or project, but also to the Organization, where the user would be display to the Organization Owner in the Organization user overview.

When a user is added to a group or project, they receive an email informing them that access was granted. We should include information about the Organization in that email.

Proposal

• Adjust the email for groups and projects to display: You have been granted access to the [group/project name] group/project, which is part of the [organization name] organization with the following role: [role]. If this was a mistake, you can leave the [group/project name] group/project or the [organization name] organization.

  • Note: Update for If this was a mistake ... organization. will be covered in #498623.

  

• Ensure to remove This is a default role. from the current email text.

Note: this work will need to sit behind an existing organization feature flag. Possibly #414592