Huawei Ads: fix cta text empty and fill rate issue

[ahmetfaruk59]

fix cta text empty and low fill rate issue

[github-actions]

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, 9f3b17e

huaweiads

Refer here for heat map coverage report

github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:266:	MakeRequests				93.3%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:324:	getFinalEndPoint			85.7%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:354:	MakeBids				91.7%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:381:	Builder					100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:394:	getExtraInfo				94.1%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:429:	getHeaders				88.9%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:445:	getReqJson				90.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:460:	getReqAdslot30				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:482:	checkAndExtractOpenrtbFormat		100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:510:	getBannerFormat				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:526:	getNativeFormat				92.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:583:	getVideoFormat				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:596:	convertAdtypeStringToInteger		60.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:620:	getReqAppInfo				93.8%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:654:	getFinalPkgName				93.8%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:689:	getClientTime				75.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:709:	getReqDeviceInfo			96.6%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:752:	getCountryCode				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:765:	convertCountryCode			75.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:786:	getCountryCodeFromMCC			100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:803:	getDeviceIDFromUserExt			100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:848:	getReqNetWorkInfo			85.7%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:884:	getReqRegsInfo				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:893:	getReqGeoInfo				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:905:	getReqConsentInfo			80.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:915:	unmarshalExtImpHuaweiAds		88.2%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:942:	checkRespStatusCode			77.8%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:965:	checkHuaweiAdsResponseRetcode		80.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:979:	convertHuaweiAdsRespToBidderResp	90.2%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1048:	getNurl					66.7%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1061:	handleHuaweiAdsContent			87.5%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1081:	extractAdmBanner			60.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1103:	extractAdmNative			90.6%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1221:	getDecodeValue				80.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1232:	jsonEncode				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1241:	extractAdmPicture			90.9%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1304:	getClickUrl				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1321:	getDspImpClickTrackings			100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1335:	getStrings				87.5%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1350:	getDuration				100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1357:	extractAdmVideo				85.4%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1520:	getVastImpClickErrorTrackingUrls	100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1540:	getVastEventTrackingUrls		100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1560:	computeHmacSha256			100.0%
github.com/prebid/prebid-server/adapters/huaweiads/huaweiads.go:1567:	getDigestAuthorization			100.0%
total:									(statements)				90.5%

[SyntaxNode]

IMPORTANT NOTICE:

This adapter is scheduled to be removed from Prebid Server for not having a working contact email address. For us to review this PR, please include an updated group email address in either this PR or via a separate issue.

Please see #2626 for further details.