test: add check license using go-licenses

[k1LoW]

ref: #751

[github-actions]

Code Metrics Report

	main (3e9753c)	#753 (86bd7ea)	+/-
Coverage	53.4%	51.9%	-1.6%
Code to Test Ratio	1:0.4	1:0.4	0.0
Test Execution Time	3m24s	3m37s	+13s

Details

  |                     | main (3e9753c) | #753 (86bd7ea) |  +/-  |
  |---------------------|----------------|----------------|-------|
- | Coverage            |          53.4% |          51.9% | -1.6% |
  |   Files             |             54 |             54 |     0 |
  |   Lines             |           5104 |           5104 |     0 |
- |   Covered           |           2728 |           2649 |   -79 |
  | Code to Test Ratio  |          1:0.4 |          1:0.4 |   0.0 |
  |   Code              |          10996 |          10996 |     0 |
  |   Test              |           4707 |           4707 |     0 |
- | Test Execution Time |          3m24s |          3m37s |  +13s |

Code coverage of files in pull request scope (53.7% → 29.1%)

Files	Coverage	+/-	Status
datasource/datasource.go	49.1%	-0.6%	affected
datasource/gcp.go	10.6%	-27.7%	affected
drivers/bq/bq.go	0.0%	-91.3%	affected

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Reported by octocov