Compile rdctst and improve CMakeLists

Main CMake improvements:

* Add rdctst with -DBUILD_TESTS=ON
* Set default ROCM_DIR to /opt/rocm/
* Split rdc_libs/CMakeLists.txt into subdirectories
* Package tests into rdc-tests.deb and .rpm

Misc improvements:

* Add .editorconfig to normalize code formatting
* Add .gitignore
* Expand RPATH for gRPC to reduce LD_LIBRARY_PATH usage
* Export compile_commands.json
* Show warning and do not install gRPC if GRPC_ROOT is left as default
* Move .in files into relevant subdirectories
* Move most variables into project CMakeLists.txt to avoid redefinitions
* Normalize CMakeLists.txt formatting (4 spaces indentation)
* Rename DIAGNOSTIC_LIB to RDC_ROCR_LIB
* Update gRPC version in README to 1.44.0
* Remove gtest source
* Pull gtest from github if not installed

Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>
Depends-On: I1039ef61247e3f0ff822925cc869fb0c2bf3af85
Change-Id: I879b21428e6642f19fda67092b365d8b78b7ba7b

src/header_template.hpp.in

@@ -0,0 +1,28 @@
+/*
+    Copyright (c) 2022 Advanced Micro Devices, Inc. All rights reserved.
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+   */
+#ifndef @include_guard@
+#define @include_guard@
+
+#pragma message("This file is deprecated. Use file from include path /opt/rocm-ver/include/ and include as rdc/@header_name@")
+@include_statements@
+
+#endif