Update Google Ads campaign settings

Changes a campaign's name, on/off state, end date or Search-partner setting. Only the fields you pass are touched; everything else is left alone. Use when: the user asked for one of these specific changes and named the campaign. Do not use when: the user only wants to pause or resume — google_pause_campaign and google_resume_campaign say exactly that and are easier to audit. Do not use it to change budgets (google_update_campaign_budget). Search partners default to off for a reason: that inventory sits on other search sites, cannot be excluded site by site, and usually performs differently from Google Search. Turning it on is a real change in where ads appear, so say so. Setting an end date stops delivery at the end of that day (23:59:59) in the account time zone. An end date before today, or before the campaign's start date, is refused. The preview shows the exact before/after for every field. If you are unsure which account, campaign or period the user means, ask them — do not guess ids or dates.