[AV-129811] Create get eventing function data source tests

[IsaacLambat]

Jira

• AV-129811

Description

• Add acceptance testing for get eventing function data source

Type of Change

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).
• This change updates the ci/cd workflow.
• Documentation fix/enhancement.

Manual Testing Approach

How was this change tested and do you have evidence? (REQUIRED: Select at least 1)

• Manually tested
• Unit tested
• Acceptance tested
• Unable to test / will not test (Please provide comments in section below)

Testing

Testing

New tests pass in CI

=== CONT  TestAccDatasourceEventingFunctionExport
=== CONT  TestAccDatasourceEventingFunction
--- PASS: TestAccDatasourceEventingFunctionExport (2.12s)
=== CONT  TestAccEventingFunctionResourceRequiredOnly
--- PASS: TestAccDatasourceEventingFunction (2.05s)

Further comments

[Copilot]

Pull request overview

This PR adds Terraform acceptance coverage for the single eventing function data source so it can be validated against the real Capella API (including export=true behavior).

Changes:

• Adds an acceptance test that creates an eventing function resource and validates the couchbase-capella_eventing_function data source can read back the definition.
• Adds an acceptance test that validates export = true behavior (status omitted while definition is still returned).
• Adds a shared config generator that provisions the resource and the corresponding data source in one config.

[factory-droid]

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