* Range: Align operator with spec and add unit tests
* Range: Remove output shape from range ref impl signature
* Range: Exclude backend unit tests for CPU and GPU due to unsupported dynamic ops
* Range: Add single layer test class for Range-4
* Range: Add unit test for shape inference
* Range: Add unit tests for i32 and f32
* Range: Refactor Range v0 backend test and added test for f32 type
* Range: Add floating point tolerance in unit tests to avoid failures due to precision
* Range: Add subgraph tests for Range add element-wise
* Range: Refactor Range class for single layer tests and add range add element-wise test with truncated inputs
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