tmf: Introduce "IMAGE" data provider type

Followed by introducing the configurable reports data providers, this commit proposes
a new data provider type called "IMAGE", which is related to different types of configurable
image reports, such as jpg, png, svg, etc.

[Added] A new data provider type called "IMAGE"

Signed-off-by: Kaveh Shahedi <kaveh.shahedi@ericsson.com>

Author: kavehshahedi

tmf/org.eclipse.tracecompass.tmf.core/src/org/eclipse/tracecompass/tmf/core/dataprovider/IDataProviderDescriptor.java

@@ -61,6 +61,12 @@ public enum ProviderType {
          * @since 6.1
          */
         DATA_TREE,
+        /**
+         * A provider for an image data (e.g., png, jpeg, etc.)
+         *
+         * @since 10.3
+         */
+        IMAGE,
         /**
          * A provider with no data. Can be used for grouping purposes and/or as data provider configurator.
          * @since 9.5