Backport PR #171222 to 8.x: Fix acceptance test assertions for updated plugin remove

[donoghuc]

Backport PR #17126 to 8.x branch, original message:

---

Release notes

[rn:skip]

What does this PR do?

This commit updates the acceptance tests to expect messages in the updated format for removing plugins. See #17030 for change.

Why is it important/What is the impact to the user?

No user impact, this is fixing acceptance test assertions

Checklist

• My code follows the style guidelines of this project
  - [ ] I have commented my code, particularly in hard-to-understand areas
  - [ ] I have made corresponding changes to the documentation
  - [ ] I have made corresponding change to the default configuration files (and/or docker env variables)
  - [ ] I have added tests that prove my fix is effective or that my feature works

Related issues

• Relates to plugins: improve remove command to support multiple plugins #17030

Logs

Example failures:
https://buildkite.com/elastic/logstash-exhaustive-tests-pipeline/builds/1359#01951fe3-2f12-46d5-872e-0af111c463ba

1) CLI operation behaves like logstash uninstall logstash-plugin uninstall on [Ubuntu 22.04] when the plugin isn't installed fails to uninstall it
--
  | Failure/Error: DEFAULT_FAILURE_NOTIFIER = lambda { \|failure, _opts\| raise failure }
  |  
  | expected "ERROR: Operation aborted, cannot remove plugin, message: The plugin `logstash-filter-qatest` has not been previously installed" to match /This plugin has not been previously installed/
  | Diff:
  | @@ -1 +1 @@
  | -/This plugin has not been previously installed/
  | +"ERROR: Operation aborted, cannot remove plugin, message: The plugin `logstash-filter-qatest` has not been previously installed"
  |  
  | Shared Example Group: "logstash uninstall" called from ./acceptance/spec/lib/cli_operation_spec.rb:37
  | # ./acceptance/spec/shared_examples/cli/logstash-plugin/uninstall.rb:36:in `block in <main>'
  | # ./Rakefile:30:in `block in <main>'
  |  
  | 2) CLI operation behaves like logstash remove logstash-plugin remove on [Ubuntu 22.04] when the plugin isn't installed fails to remove it
  | Failure/Error: DEFAULT_FAILURE_NOTIFIER = lambda { \|failure, _opts\| raise failure }
  |  
  | expected "ERROR: Operation aborted, cannot remove plugin, message: The plugin `logstash-filter-qatest` has not been previously installed" to match /This plugin has not been previously installed/
  | Diff:
  | @@ -1 +1 @@
  | -/This plugin has not been previously installed/
  | +"ERROR: Operation aborted, cannot remove plugin, message: The plugin `logstash-filter-qatest` has not been previously installed"
  |  
  | Shared Example Group: "logstash remove" called from ./acceptance/spec/lib/cli_operation_spec.rb:38
  | # ./acceptance/spec/shared_examples/cli/logstash-plugin/remove.rb:36:in `block in <main>'
  | # ./Rakefile:30:in `block in <main>'
  |  
  | 3) CLI operation behaves like integration plugins compatible logstash-plugin uninstall on [Ubuntu 22.04] when the integration is installed trying to uninstall an inner plugin fails to uninstall it
  | Failure/Error: DEFAULT_FAILURE_NOTIFIER = lambda { \|failure, _opts\| raise failure }
  |  
  | expected "ERROR: Operation aborted, cannot remove plugin, message: The plugin `logstash-input-rabbitmq` is provided by 'logstash-integration-rabbitmq' so it can't be removed individually" to match /is already provided by/
  | Diff:
  | @@ -1 +1 @@
  | -/is already provided by/
  | +"ERROR: Operation aborted, cannot remove plugin, message: The plugin `logstash-input-rabbitmq` is provided by 'logstash-integration-rabbitmq' so it can't be removed individually"
  |  
  | Shared Example Group: "integration plugins compatible" called from ./acceptance/spec/lib/cli_operation_spec.rb:40
  | # ./acceptance/spec/shared_examples/cli/logstash-plugin/integration_plugin.rb:78:in `block in <main>'
  | # ./Rakefile:30:in `block in <main>'
  |  
  | Finished in 21 minutes 10 seconds (files took 1.68 seconds to load)
  | 30 examples, 3 failures, 1 pending

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: f22e3b0

Failed CI Steps

• 🥼 Integration Tests / part 1

[mashhurs]

LGTM!