OpenWeb: Add support for test mode

[Dedis23]

[github-actions[bot]]

Code coverage summary

Note:

• Prebid team doesn't anticipate tests covering code paths that might result in marshal and unmarshal errors
• Coverage summary encompasses all commits leading up to the latest one, b6c5358e6a60301d7ec664c1507fd8c644666c28

openweb

Refer here for heat map coverage report

github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:29:	MakeRequests		78.6%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:60:	checkExtAndExtractOrg	86.7%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:89:	MakeBids		84.2%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:128:	getMediaTypeForBid	100.0%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:142:	Builder			100.0%
total:									(statements)		85.2%

[pm-isha-bharti]

Please add test coverage for the newly added code.

[github-actions[bot]]

Code coverage summary

Note:

• Prebid team doesn't anticipate tests covering code paths that might result in marshal and unmarshal errors
• Coverage summary encompasses all commits leading up to the latest one, 675839288cd3e1d9eb0a6b97b23feeb1c330e39f

openweb

Refer here for heat map coverage report

github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:29:	MakeRequests		81.8%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:55:	checkExtAndExtractOrg	86.7%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:84:	MakeBids		84.2%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:123:	getMediaTypeForBid	100.0%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:137:	Builder			100.0%
github.com/prebid/prebid-server/v3/adapters/openweb/openweb.go:145:	buildEndpoint		100.0%
total:									(statements)		87.3%