ci: avoid running expensive e2e but validate signature

[v1v]

Closes #370

[Copilot]

Pull Request Overview

This PR optimizes CI workflows by removing expensive end-to-end tests while maintaining signature validation. The changes reduce unnecessary infrastructure creation and teardown operations that were running as part of the test suite, particularly targeting tests that actually create clusters with wait periods.

Key changes:

• Removed expensive "wait" jobs that create real infrastructure
• Added conditional execution to skip undeploy operations during merge group events
• Standardized dry-run input handling across workflows

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
.github/workflows/test-oblt-cli-undeploy-my-kibana.yml	Added dry-run input parameter and conditional execution to skip during merge groups
.github/workflows/test-oblt-cli-cluster-create-serverless.yml	Removed expensive "wait" job that creates and destroys real clusters
.github/workflows/test-oblt-cli-cluster-create-custom.yml	Removed "wait" job and standardized dry-run parameter handling
.github/workflows/test-oblt-cli-cluster-create-ccs.yml	Removed expensive "wait" job that creates infrastructure with wait periods

[Copilot]

The default value for dry-run is set to false, but line 35 adds a condition to skip execution during merge_group events. This creates inconsistent behavior: workflow_dispatch will execute real undeploy operations by default (potentially dangerous), while merge_group skips execution entirely. The default should be true to ensure safe behavior unless explicitly overridden.

Suggested change

	default: false
	default: true

[fr4nc1sc0-r4m0n]

If I'm not wrong, this parameter is not used in this workflow