[TT-8298] Fixing bug of empty APIName and APIID in access_rights (#5260)

The tag of APIName and APIID was wrong because of which API was
returning empty string

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## Description

https://tyktech.atlassian.net/browse/TT-8298
#4350

in house PR for #4854 (to run
CI)

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Co-authored-by: Kumar Sukhani <[email protected]>
(cherry picked from commit a0908cc)

gateway/policy.go

@@ -18,8 +18,8 @@ import (
 )
 
 type DBAccessDefinition struct {
-	APIName              string                       `json:"apiname"`
-	APIID                string                       `json:"apiid"`
+	APIName              string                       `json:"api_name"`
+	APIID                string                       `json:"api_id"`
 	Versions             []string                     `json:"versions"`
 	AllowedURLs          []user.AccessSpec            `bson:"allowed_urls" json:"allowed_urls"` // mapped string MUST be a valid regex
 	RestrictedTypes      []graphql.Type               `json:"restricted_types"`