feat: added FailedMount event reason to get the failure in pod analyzer

[lili-wan]

📑 Description

The FailedMount failure is a common Kubernetes issue when a engineer wants to attach volume to the pod. I was not be able to capture this pod event when I run analyzer with filter Pod. Therefore, I added the event reason FailedMount to be included in failure messages

Before:

./k8sgpt analyze --filter Pod --namespace  my-namespace
AI Provider: openai

No problems detected

After:

./k8sgpt analyze --filter Pod --namespace my-namespace
AI Provider: AI not used; --explain not set

0  my-namespace/efs-csi-app(efs-csi-app)
- Error: Unable to attach or mount volumes: unmounted volumes=[efs-storage], unattached volumes=[efs-storage kube-api-access-n44mc]: timed out waiting for the condition

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

ℹ Additional Information

[lili-wan]

@AlexsJones Hi Alex, thanks for reviewing the PR, could you please trigger the workflow as well? I resolved the conflict and the pipeline got re-triggered, thanks

[lili-wan]

@AlexsJones Hi Alex, looks like the linter failed with some other files

/home/runner/work/_temp/reviewdog-Lgzh1S/golangci-lint-1.55.2-linux-amd64/golangci-lint run --out-format line-number --timeout=120s
  pkg/analyzer/gateway_test.go:95:29: Error return value is not checked (errcheck)
  	apiextensionsv1.AddToScheme(scheme)
  	                           ^
  pkg/analyzer/gateway_test.go:127:16: Error return value is not checked (errcheck)
  	gtwapi.Install(scheme)
  	              ^
  pkg/analyzer/gateway_test.go:128:29: Error return value is not checked (errcheck)
  	apiextensionsv1.AddToScheme(scheme)
  	                           ^
  pkg/server/server_test.go:36:25: Error return value of `server_config.Shutdown` is not checked (errcheck)
  		server_config.Shutdown()
  		                      ^
  cmd/serve/serve.go:123:20: Error return value of `logger.Sync` is not checked (errcheck)
  		defer logger.Sync()
  		                 ^
  pkg/server/integration.go:40:6: ineffectual assignment to err (ineffassign)
  	var err error = status.Error(codes.OK, "")
  	    ^
  pkg/server/integration.go:127:8: ineffectual assignment to err (ineffassign)
  			in, err := integrationProvider.Get(i)
  			    ^
  pkg/server/server_test.go:31:3: SA2000: should call wg.Add(1) before starting the goroutine to avoid a race (staticcheck)
  		wg.Add(1)
  		^
  pkg/integration/prometheus/config_analyzer.go:1[95](https://github.com/k8sgpt-ai/k8sgpt/actions/runs/7629324462/job/20811494870?pr=883#step:3:100):34: SA1024: cutset contains duplicate characters (staticcheck)
  				path = strings.TrimLeft(arg, prometheusConfigFlag)
  				                             ^
  pkg/integration/prometheus/config_analyzer.go:1[98](https://github.com/k8sgpt-ai/k8sgpt/actions/runs/7629324462/job/20811494870?pr=883#step:3:103):34: SA[102](https://github.com/k8sgpt-ai/k8sgpt/actions/runs/7629324462/job/20811494870?pr=883#step:3:107)4: cutset contains duplicate characters (staticcheck)
  				path = strings.TrimLeft(arg, configReloaderConfigFlag)
  				                             ^
  pkg/analyzer/mutating_webhook.go:64:5: SA4006: this value of `failures` is never used (staticcheck)
  				failures = append(failures, common.Failure{
  				^
  pkg/analyzer/validating_webhook.go:62:5: SA4006: this value of `failures` is never used (staticcheck)
  				failures = append(failures, common.Failure{
  				^
  level=error msg="Timeout exceeded: try increasing it by passing --timeout option"

Not related to my changes, what's the recommendation steps here? thanks