VITIS-13441 : Allow shim to read a special flag from xrt.ini for dummy app #1548

Job	Run time
authorize	9s
apu-package-build	39m 59s
windows-build	12m 45s
build (centos78, rpm)	19m 7s
build (centos8, rpm)	22m 50s
build (rhel9, rpm)	19m 54s
build (ubuntu2004, deb)	24m 15s
build (hip, deb)	14m 45s
build (ubuntu2404, deb)	12m 14s
package-download	40s
pcie-sw-emulation-tests (centos_8.1)	9m 34s
pcie-hw-emulation-tests (centos_8.1)	27m 35s
extract-platforms	10s
pcie-hw-tests (xilinx_u250_gen3x16_xdma_4_1_202210_1)	57m 42s
test-summary	10s
cleanup-build	13s
	4h 22m 2s

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