build(deps-dev): Bump @grafana/plugin-e2e from 1.14.2 to 1.15.0 #661

Job	Run time
lint / lint	37s
build / build	5m 26s
e2e-tests / tests (10.3.0, accessControlOnCall,idForwarding,externalServiceAccounts, false, local-chrome-10.3...	2m 38s
e2e-tests / tests (10.4.5, accessControlOnCall,idForwarding,externalServiceAccounts, true, local-chrome-10.4....	2m 38s
e2e-tests / tests (10.4.7, ws://localhost:9222, externalServiceAccounts, false, remote-chrome-10.4.7-without-...	3m 24s
e2e-tests / tests (11.1.0, ws://localhost:9222, accessControlOnCall,idForwarding,externalServiceAccounts, fal...	2m 32s
e2e-tests / tests (11.3.0-security-01, accessControlOnCall,idForwarding,externalServiceAccounts, false, remot...	2m 36s
e2e-tests / tests (11.4.0, ws://localhost:9222, accessControlOnCall,idForwarding,externalServiceAccounts, fal...	2m 41s
e2e-tests / tests (11.4.0, ws://localhost:9222, accessControlOnCall,idForwarding,externalServiceAccounts, tru...	2m 20s
package / package	1m 30s
	26m 22s

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