Update references to test helpers

Replace:
* tests/src -> framework/tests/src
* tests/include -> framework/tests/include

Except for occurrences of:
* tests/src/test_helpers (since this only contains ssl_helpers.c)
* tests/src/test_certs.h
* tests/include/alt_dummy

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c9c0a6d..f915188 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -398,7 +398,7 @@
 add_subdirectory(pkgconfig)
 
 #
-# The C files in tests/src directory contain test code shared among test suites
+# The C files in framework/tests/src directory contain test code shared among test suites
 # and programs. This shared test code is compiled and linked to test suites and
 # programs objects as a set of compiled objects. The compiled objects are NOT
 # built into a library that the test suite and program objects would link
@@ -417,7 +417,7 @@
     add_library(mbedtls_test_helpers OBJECT ${MBEDTLS_TEST_HELPER_FILES})
     set_base_compile_options(mbedtls_test_helpers)
     target_include_directories(mbedtls_test_helpers
-        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/tests/include
+        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/framework/tests/include
         PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
         PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/tf-psa-crypto/include
         PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/tf-psa-crypto/drivers/builtin/include