Add C++ test for qrc support


Only enabled on WebEngine for now

Pick-to: 6.12
Task-number: QTBUG-142094
Change-Id: I49ff11dcd8693e023c61d90abb274b20a52f3f6b
Reviewed-by: Moss Heim <moss.heim@qt.io>
commit4b2c45c4e186391e4e27d9a221db1973eadf62ab
parentfd240901d3e8f20dd2bb5a579ad755f92b532c88
authorKaloyan Chehlarski <kaloyan.chehlarski@qt.io>
committerKaloyan Chehlarski <kaloyan.chehlarski@qt.io>
commit timeTue, 2 Jun 2026 14:46:28 +0000