Deprecate legacy API [AP-643] #1396

Job	Run time
macOS	9m 0s
Test Big Endian	9m 5s
Ubuntu 18.04 (Build: Debug, Compilers: gcc-6/g++-6, Shared Library: true)	8m 48s
Ubuntu 18.04 (Build: Debug, Compilers: clang-6.0/clang++-6.0, Shared Library: true)	8m 52s
Bazel	6m 43s
Windows 2019 (Generator: MinGW Makefiles, Shared Library: true)	8m 50s
Ubuntu 18.04 (Build: Debug, Compilers: clang-6.0/clang++-6.0, Shared Library: false)	8m 52s
Windows 2019 (Generator: MinGW Makefiles, Shared Library: false)	8m 53s
Ubuntu 18.04 (Build: Release, Compilers: gcc-6/g++-6, Shared Library: true)	8m 48s
Ubuntu 18.04 (Build: Release, Compilers: gcc-6/g++-6, Shared Library: false)	8m 51s
Windows 2019 (Generator: Visual Studio 16 2019, Shared Library: true)	8m 47s
Ubuntu 18.04 (Build: Release, Compilers: clang-6.0/clang++-6.0, Shared Library: true)	8m 50s
Windows 2019 (Generator: Visual Studio 16 2019, Shared Library: false)	8m 50s
Ubuntu 18.04 (Build: Release, Compilers: clang-6.0/clang++-6.0, Shared Library: false)	8m 52s
	2h 2m 1s

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