Rename /contracts/events to /blockchainevents

[awrichar]

Also move the query helpers from Contract Manager to Orchestrator, as this
has become a generic construct that spans more than one manager/plugin.

[codecov-commenter]

Codecov Report

Merging #443 (4b78cb9) into main (32bad71) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #443   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          278       278           
  Lines        14952     14952           
=========================================
  Hits         14952     14952           

Impacted Files	Coverage Δ
internal/contracts/manager.go	100.00% <ø> (ø)
internal/orchestrator/orchestrator.go	100.00% <ø> (ø)
...rnal/apiserver/route_get_blockchain_event_by_id.go	100.00% <100.00%> (ø)
internal/apiserver/route_get_blockchain_events.go	100.00% <100.00%> (ø)
internal/orchestrator/data_query.go	100.00% <100.00%> (ø)

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[peterbroadhurst]

📝 ⛓️

[peterbroadhurst]

Some e2e changes still needed before merge:

2022-01-24T23:02:32.8167161Z     restclient.go:75: Headers: map[Content-Length:[31] Content-Type:[application/json application/json] Date:[Mon, 24 Jan 2022 23:02:32 GMT] Vary:[Origin]]
2022-01-24T23:02:32.8167559Z     restclient.go:625: 
2022-01-24T23:02:32.8168020Z         	Error Trace:	restclient.go:625
2022-01-24T23:02:32.8168782Z         	            				e2e_test.go:332
2022-01-24T23:02:32.8169477Z         	            				ethereum_contract_test.go:329
2022-01-24T23:02:32.8169781Z         	Error:      	Not equal: 
2022-01-24T23:02:32.8170259Z         	            	expected: 200
2022-01-24T23:02:32.8170603Z         	            	actual  : 404
2022-01-24T23:02:32.8170992Z         	Test:       	TestEthereumE2ESuite/TestFFIInvokeMethod
2022-01-24T23:02:32.8171988Z         	Messages:   	GET /namespaces/default/contracts/events/ee78af00-43a9-459e-b96c-c82af11b9744 [404]: {"error":"FF10109: Not found"}
2022-01-24T23:02:32.8172649Z     e2e_test.go:259: Websocket 127.0.0.1:5000 closing, error: read tcp 127.0.0.1:51528->127.0.0.1:5000: use of closed network connection