IVGCVSW-7344  Add LeakyRelu Activation support to TOSA Reference Backend

  * Adding a one to many FP32 tosa mapping for Leaky Relu
  * Added a few utilities that are needed
  * Added new tests

Signed-off-by: Tracy Narine <tracy.narine@arm.com>
Change-Id: If1d7c57a523961581777a244416a7346a9310803
diff --git a/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp b/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
index 63fa69d..7a3edaf 100644
--- a/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
+++ b/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
@@ -25,7 +25,7 @@
 
 TEST_SUITE("TosaRefEndToEnd")
 {
-std::vector<BackendId> tosaDefaultBackends = { "TosaRef" };
+static std::vector<BackendId> tosaDefaultBackends = { "TosaRef" };
 
 // Addition
 TEST_CASE("TosaRefAdditionEndtoEndTestFloat32")