Remove unnecessary test jobs #101

Job	Run time
Verify docs and spelling	42s
Check whether tests need to be run based on diff	17s
Golangci-lint (ubuntu-latest)	9m 14s
Unit test (windows-2022)	12m 29s
Go benchmark test	5m 19s
Build Antrea and antctl binaries	13m 5s
Integration test	6m 4s
Golangci-lint (macos-latest)	13m 0s
Unit test (ubuntu-latest)	7m 45s
Build Antrea Windows binaries	2m 12s
Check tidy, code generation and manifest	4m 28s
	1h 14m 35s

Provide feedback