Implement consistent file extensions for Typescript imports (#4492) #960

Job	Run time
cpp-lib-build (macos-11, clang, ON)	4m 29s
cpp-lib-build (macos-11, clang, OFF)	7m 43s
build (macos-11, tool)	1m 46s
cpp-lib-build (macos-11, gcc, ON)	4m 41s
build (macos-11, cpp)	31m 50s
cpp-lib-build (macos-11, gcc, OFF)	7m 25s
build (macos-11, csharp)	9m 57s
cpp-lib-build (ubuntu-20.04, clang, ON)	2m 51s
build (macos-11, dart)	7m 11s
cpp-lib-build (ubuntu-20.04, clang, OFF)	4m 11s
build (macos-11, go)	4m 47s
cpp-lib-build (ubuntu-20.04, gcc, ON)	2m 25s
build (macos-11, java)	2m 5s
cpp-lib-build (ubuntu-20.04, gcc, OFF)	4m 21s
build (macos-11, javascript)	2m 38s
cpp-lib-build (windows-2022, clang, ON)	5m 15s
build (macos-11, typescript)	20m 21s
cpp-lib-build (windows-2022, clang, OFF)	5m 32s
build (macos-11, php)	13m 58s
cpp-lib-build (windows-2022, cl)	4m 35s
build (macos-11, python3)	1m 58s
build (ubuntu-20.04, tool)	1m 26s
build (ubuntu-20.04, cpp)	17m 15s
build (ubuntu-20.04, csharp)	5m 20s
build (ubuntu-20.04, dart)	3m 56s
build (ubuntu-20.04, go)	2m 58s
build (ubuntu-20.04, java)	1m 20s
build (ubuntu-20.04, javascript)	1m 46s
build (ubuntu-20.04, typescript)	9m 52s
build (ubuntu-20.04, php)	1m 36s
build (ubuntu-20.04, python3)	1m 33s
build (windows-2022, tool)	1m 34s
build (windows-2022, cpp)	23m 18s
build (windows-2022, csharp)	7m 29s
build (windows-2022, dart)	4m 12s
build (windows-2022, go)	5m 56s
build (windows-2022, java)	2m 0s
build (windows-2022, javascript)	3m 49s
build (windows-2022, typescript)	23m 12s
build (windows-2022, php)	1m 59s
build (windows-2022, python3)	1m 46s
	4h 32m 16s

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