fix(metrics): DENG-3273 Update third_party_auth login event names for consistency between accounts-events and events pings

[akkomar]

Because

• We want event names in accounts-events ping to be consistent with event metric categories and names in events ping

This pull request

• Updates recently added event names for consistency

Issue that this pull request solves

Closes: Closes: issue similar to described in https://mozilla-hub.atlassian.net/browse/DENG-3273?focusedCommentId=907454

Checklist

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• [ ] My commit is GPG signed.
• [ ] If applicable, I have modified or added tests which pass locally.
• [ ] I have added necessary documentation (if appropriate).
• [ ] I have verified that my changes render correctly in RTL (if appropriate).

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[vpomerleau]

Should all the event names for google/apple in the taxonomy sheet be updated to included third_party_auth?

[chenba]

@akkomar I don't think we need this PR anymore?

[akkomar]

@akkomar I don't think we need this PR anymore?

Yes, this doesn't seem to be needed anymore.