AV-2184: Remove bulk event sending as it is not supported

[bzar]

• Bulk sending is apprently not functional for the kind of events we send for API requests, so use regular tracking

[coveralls]

Pull Request Test Coverage Report for Build 8719031542

Details

• 1 of 5 (20.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.4%) to 41.353%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
ckanext/matomo/tracking.py	1	5	20.0%
<!--	Total:	1	5	20.0%	-->

Totals
Change from base Build 8702820528:	0.4%
Covered Lines:	605
Relevant Lines:	1463

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💛 - Coveralls