[TDL-24255] Fix for attribute & generated relationship name

[shantanu73]

Description of change

JIRA Fixed attribute & generated relationship name issue with mailings stream for followUpSequenceId attribute.

Manual QA steps

• Generated test data for mailings stream
• Ran discovery and sync

Risks

• Customer connections will fail for mailings stream if this fix is not pushed.

Rollback steps

• revert this branch

[shantanu73]

Did an alpha for the customer and their connection is working now with changes in this PR. So, it is good to merge.