feat(Usage Reports): add "created_by_email_id" to Offer schema

[Jdatechong]

PR summary

updated offers to have the created_by_email_id field

PR Checklist

Please make sure that your PR fulfills the following requirements:

• The commit message follows the Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Current vs new behavior

updated offers to have the created_by_email_id field

Does this PR introduce a breaking change?

• Yes
• No

Other information

Test results:

test/unit/test_case_management_v1.py .....................................................................                             [  3%]
test/unit/test_catalog_management_v1.py .............................................................................................. [  7%]
...................................................................................................................................... [ 13%]
...................................................................................................................................... [ 20%]
...................................                                                                                                    [ 21%]
test/unit/test_common.py .                                                                                                             [ 21%]
test/unit/test_context_based_restrictions_v1.py ...................................................................................... [ 25%]
.................                                                                                                                      [ 26%]
test/unit/test_enterprise_billing_units_v1.py ..................................                                                       [ 28%]
test/unit/test_enterprise_management_v1.py .................................................................................           [ 32%]
test/unit/test_enterprise_usage_reports_v1.py ..............                                                                           [ 32%]
test/unit/test_global_catalog_v1.py .................................................................................                  [ 36%]
test/unit/test_global_search_v2.py ........                                                                                            [ 36%]
test/unit/test_global_tagging_v1.py .............................................                                                      [ 38%]
test/unit/test_iam_access_groups_v2.py ............................................................................................... [ 43%]
...................................................................................................................................... [ 49%]
..........................                                                                                                             [ 50%]
test/unit/test_iam_identity_v1.py .................................................................................................... [ 55%]
...................................................................................................................................... [ 61%]
...................................................................................................................................... [ 68%]
........................                                                                                                               [ 69%]
test/unit/test_iam_policy_management_v1.py ........................................................................................... [ 73%]
.......................................................................................................................                [ 79%]
test/unit/test_ibm_cloud_shell_v1.py ....                                                                                              [ 79%]
test/unit/test_open_service_broker_v1.py ...................................                                                           [ 80%]
test/unit/test_partner_billing_units_v1.py ........................                                                                    [ 82%]
test/unit/test_partner_usage_reports_v1.py .................                                                                           [ 82%]
test/unit/test_resource_controller_v2.py ............................................................................................. [ 87%]
................................................................                                                                       [ 90%]
test/unit/test_resource_manager_v2.py ....................................                                                             [ 91%]
test/unit/test_usage_metering_v4.py ......                                                                                             [ 92%]
test/unit/test_usage_reports_v4.py ................................................................................................... [ 96%]
.......                                                                                                                                [ 97%]
test/unit/test_user_management_v1.py ..............................................................                                    [100%]

=========================================================== 2137 passed in 58.59s ============================================================

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 3 committers have signed the CLA.

✅ Jdatechong
✅ pyrooka
❌ bssmetering
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[pyrooka]

Looks good! The only question I have is: have you signed the CLA?

[pyrooka]

@Jdatechong Please re-gen the code by using the latest version of the generator. Thank you!

[pyrooka]

Changes are looking good!

[ibm-devx-sdk]

🎉 This PR is included in version 0.59.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀