Fix migration test after 1.2.0 release

[pkosiec]

Description

Changes proposed in this pull request:

• Fix migration test after 1.2.0 release

See failed run:
https://github.com/kubeshop/botkube/actions/runs/5600763602/jobs/10244234617

  migration_test.go:143: 
        	Error Trace:	/home/runner/work/botkube/botkube/test/e2e/migration_test.go:252
        	            				/home/runner/work/botkube/botkube/test/e2e/migration_test.go:143
        	Error:      	"[%!s(*graphql.Alias=&{d620f1a5-3db1-4c84-bcfe-e9ea943e3137 k Kubectl alias kubectl [0xc000a01dc0]}) %!s(*graphql.Alias=&{fbb18af9-7cfc-442b-8ad1-b35c187b5874 kc Kubectl alias kubectl [0xc000a01e00]}) %!s(*graphql.Alias=&{5a9f73d4-5dfd-4d2d-9508-3a7dea1aac66 x Exec alias exec [0xc000a01e20]}) %!s(*graphql.Alias=&{d70238b0-e493-48be-a4b5-891085dc9fba chatgpt Doctor alias doctor [0xc000a01e40]})]" should have 2 item(s), but has 4
        	Test:       	TestBotkubeMigration/Check_if_the_instance_is_created_on_Botkube_Cloud_side
    migration_test.go:143: 
        	Error Trace:	/home/runner/work/botkube/botkube/test/e2e/migration_test.go:260
        	            				/home/runner/work/botkube/botkube/test/e2e/migration_test.go:143
        	Error:      	elements differ
        	            	
        	            	extra elements in list B:
        	            	([]interface {}) (len=2) {
        	            	 (*graphql.Alias)({
        	            	  ID: (string) "",
        	            	  Name: (string) (len=1) "x",
        	            	  DisplayName: (string) (len=10) "Exec alias",
        	            	  Command: (string) (len=4) "exec",
        	            	  Deployments: ([]*graphql.DeploymentInfo) <nil>
        	            	 }),
        	            	 (*graphql.Alias)({
        	            	  ID: (string) "",
        	            	  Name: (string) (len=7) "chatgpt",
        	            	  DisplayName: (string) (len=12) "Doctor alias",
        	            	  Command: (string) (len=6) "doctor",
        	            	  Deployments: ([]*graphql.DeploymentInfo) <nil>
        	            	 })
        	            	}
        	            	

[josefkarasek]

lgtm 👍