Fix ETD Module failing tests issue 19086

[vijaykanthm]

This PR aims to fix the ETD Module failing test issue raised in #19086

References to the previous PR's worked on this:
#11469 & #11650
ETD Custom Module REST Doc link: https://cloud.google.com/security-command-center/docs/reference/security-center-management/rest/v1/organizations.locations.eventThreatDetectionCustomModules

Release Note Template for Downstream PRs (will be copied)

compute: added `provider` field to `google_scc_management_organization_event_threat_detection_custom_module` resource (beta)``

[github-actions]

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[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

google provider: Diff ( 1 file changed, 3 insertions(+), 41 deletions(-))
google-beta provider: Diff ( 1 file changed, 5 insertions(+), 6 deletions(-))

[modular-magician]

Tests analytics

Total tests: 1
Passed tests: 1
Skipped tests: 0
Affected tests: 0

Click here to see the affected service packages

• securitycentermanagement

$\textcolor{green}{\textsf{All tests passed!}}$

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