Metrics: Fix account.ACCOUNT_ID.requests.gotbids metric

[And1sS]

🔧 Type of changes

• new bid adapter
• bid adapter update
• new feature
• new analytics adapter
• new module
• module update
• bugfix
• documentation
• configuration
• dependency update
• tech debt (test coverage, refactorings, etc.)

✨ What's the context?

Metric has been incremented multiple times (for every bidder seatbid).

🧪 Test plan

Another unit test. Hopefully, this is sufficient enough this time :).

🏎 Quality check

• Are your changes following our code style guidelines?
• Are there any breaking changes in your code?
• Does your test coverage exceed 90%?
• Are there any erroneous console logs, debuggers or leftover code in your changes?