Set HEAL generic wkspc to use notebook welcome page

[smvgarcia]

Link to Jira ticket if there is one: https://ctds-planx.atlassian.net/browse/HP-2697

Environments

preprod HEAL

Description of changes

For the generic workspace image, update the launch page to be the new welcome notebook instead of the markdown file

[ciresiemanym]

👍

[github-actions]

Integration Tests

Test summary after running integration tests

filepath	passed	failed	skipped	SUBTOTAL
tests/test_gen3_workflow.py	0	0	29	29
tests/test_dicom_viewer.py	0	0	4	4
tests/test_pfb_export.py	0	0	1	1
tests/test_oauth2.py	0	0	15	15
tests/test_centralized_auth.py	0	0	16	16
tests/test_guppy_service.py	0	0	13	13
tests/test_audit_service.py	3	0	3	6
tests/test_ras_authn.py	0	0	3	3
tests/test_ras_passport.py	0	0	3	3
tests/test_graph_submit_and_query.py	12	1	1	14
tests/test_data_upload.py	8	0	1	9
tests/test_requestor.py	5	0	1	6
tests/test_dbgap.py	4	0	1	5
tests/test_user_data_library.py	0	0	4	4
tests/test_study_viewer.py	0	0	3	3
tests/test_discoverypage.py	0	0	1	1
tests/test_user_login_activation.py	2	0	1	3
tests/test_gen3ff_landing_page.py	0	0	2	2
tests/test_register_user.py	0	0	2	2
tests/test_google_data_access.py	0	0	1	1
tests/test_aggregate_mds.py	0	0	1	1
tests/test_etl.py	0	0	1	1
tests/test_env_sanity.py	0	0	1	1
tests/test_presigned_url.py	7	0	0	7
tests/test_user_token.py	5	0	0	5
tests/test_drs_endpoint.py	6	0	0	6
tests/test_login_page.py	2	0	0	2
tests/test_oidc_client.py	2	0	0	2
tests/test_homepage.py	1	0	0	1
tests/test_client_credentials.py	1	0	0	1
tests/test_workspace.py	1	0	0	1
tests/test_gen3_sdk.py	1	0	0	1
tests/test_fence_admin.py	2	0	0	2
tests/test_gen3client.py	1	0	0	1
tests/test_manifest_service.py	1	0	0	1
TOTAL	64	1	108	173

Test summary after rerunning failed integration tests

filepath	passed	SUBTOTAL
tests/test_graph_submit_and_query.py	1	1
TOTAL	1	1

Please find the detailed integration test report here

Please find the detailed integration test report after rerunning failed tests here

Please find the Github Action logs here