fix(deps): update DA dependencies + example / tests cleanup

[ocofaigh]

Description

DEPENDS ON: terraform-ibm-modules/terraform-ibm-event-notifications#554

• Updated to latest DA dependency versions
• I added Event Notifications as a dependnat DA (however the mapping of the instance CRN is still blocked due to project bug thats being looked at)
• Fixed typos
• Cleanup tests (we already test fully configurable DA in the addons test and security enforced test (since its a wrapper around fully configurable) so no need to duplicate the test)

Release required?

• No release
• Patch release (x.x.X)
• Minor release (x.X.x)
• Major release (X.x.x)

Release notes content

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• If relevant, a test for the change is included or updated with this PR.
• If relevant, documentation for the change is included or updated with this PR.

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[ocofaigh]

/run pipeline

[ocofaigh]

Looks like some network issues when trying to pull from terraform registry:

 2025/09/18 20:29:36 Terraform init | Error: Error accessing remote module registry
 2025/09/18 20:29:36 Terraform init | 
 2025/09/18 20:29:36 Terraform init |   on main.tf line 5:
 2025/09/18 20:29:36 Terraform init |    5: module "resource_group" {
 2025/09/18 20:29:36 Terraform init | 
 2025/09/18 20:29:36 Terraform init | Failed to retrieve available versions for module "resource_group" (main.tf:5)
 2025/09/18 20:29:36 Terraform init | from registry.terraform.io: the request failed after 2 attempts, please try
 2025/09/18 20:29:36 Terraform init | again later: Get
 2025/09/18 20:29:36 Terraform init | "https://registry.terraform.io/v1/modules/terraform-ibm-modules/resource-group/ibm/versions":
 2025/09/18 20:29:36 Terraform init | net/http: request canceled (Client.Timeout exceeded while awaiting headers).
 2025/09/18 20:29:36 Terraform init | 
 2025/09/18 20:29:36 Terraform init | Error: Error accessing remote module registry
 2025/09/18 20:29:36 Terraform init | 
 2025/09/18 20:29:36 Terraform init |   on main.tf line 356:
 2025/09/18 20:29:36 Terraform init |  356: module "secrets_manager_service_credentials" {
 2025/09/18 20:29:36 Terraform init | 
 2025/09/18 20:29:36 Terraform init | Failed to retrieve available versions for module
 2025/09/18 20:29:36 Terraform init | "secrets_manager_service_credentials" (main.tf:356) from
 2025/09/18 20:29:36 Terraform init | registry.terraform.io: the request failed after 2 attempts, please try again
 2025/09/18 20:29:36 Terraform init | later: Get
 2025/09/18 20:29:36 Terraform init | "https://registry.terraform.io/v1/modules/terraform-ibm-modules/secrets-manager/ibm/versions":
 2025/09/18 20:29:36 Terraform init | net/http: request canceled (Client.Timeout exceeded while awaiting headers).

Retrying..

[ocofaigh]

/run pipeline

[terraform-ibm-modules-ops]

🎉 This PR is included in version 1.6.28 🎉

The release is available on:

• GitHub release
• v1.6.28

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