gazebo_static_camera: use param instead of file #1397

Job	Run time
build	2m 29s
test-scenario-execution	4m 3s
test-scenario-execution-ros	10m 35s
scenario-files-validation	2m 49s
test-example-library	1m 14s
test-example-multirobot	7m 17s
test-example-external-method	1m 36s
test-example-nav2	4m 51s
test-example-scenario	1m 35s
test-example-simulation	5m 12s
test-example-variation	1m 41s
test-scenario-execution-gazebo	6m 46s
test-scenario-execution-nav2	9m 43s
test-scenario-execution-pybullet	1m 35s
test-scenario-execution-x11	2m 2s
tests	12s
	1h 3m 40s

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