chore(deps): update dependency webpack-cli to v7 #1673

Job	Run time
CI / Check for release channel / Check for release channel	8s
CI / Test and build plugin	3m 29s
CI / Test docs	29s
CI / Upload to GCS	17s
CI / Playwright E2E tests / Resolve Grafana images	8s
CI / Plugins - Dockerized Playwright E2E tests	0s
CI / Playwright E2E tests / e2e grafana-dev@13.1.0-24278035669	3m 45s
CI / Playwright E2E tests / e2e grafana-enterprise@11.5.10	2m 44s
CI / Playwright E2E tests / e2e grafana-enterprise@11.1.13	3m 35s
CI / Playwright E2E tests / e2e grafana-enterprise@10.4.19	2m 32s
CI / Playwright E2E tests / e2e grafana-enterprise@12.4.2	3m 29s
CI / Playwright E2E tests / e2e grafana-enterprise@dev-preview-react19	2m 44s
CI / Playwright E2E tests / e2e grafana-enterprise@12.2.8	3m 20s
CI / Playwright E2E tests / Check Playwright E2E matrix status	5s
	26m 45s

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