Use 7.* IdentityModel package in val pipeline (#57349)

Author: wtgodbe

eng/Versions.props

@@ -13,7 +13,7 @@
     </PreReleaseVersionIteration>
     <ValidateBaseline>false</ValidateBaseline>
     <IdentityModelVersion Condition="'$(IsIdentityModelTestJob)' != 'true'">7.1.2</IdentityModelVersion>
-    <IdentityModelVersion Condition="'$(IsIdentityModelTestJob)' == 'true'">*-*</IdentityModelVersion>
+    <IdentityModelVersion Condition="'$(IsIdentityModelTestJob)' == 'true'">7.*</IdentityModelVersion>
     <!--
         When StabilizePackageVersion is set to 'true', this branch will produce stable outputs for 'Shipping' packages
     -->