Move GetText(), SetText(), and String() from CommonToken to BaseToken #855

Job	Run time
cpp-lib-build (macos-11, clang, ON)	5m 33s
cpp-lib-build (macos-11, clang, OFF)	5m 22s
cpp-lib-build (macos-11, gcc, ON)	6m 0s
cpp-lib-build (macos-11, gcc, OFF)	10m 38s
cpp-lib-build (ubuntu-20.04, clang, ON)	3m 42s
cpp-lib-build (ubuntu-20.04, clang, OFF)	6m 28s
cpp-lib-build (ubuntu-20.04, gcc, ON)	4m 32s
cpp-lib-build (ubuntu-20.04, gcc, OFF)	7m 20s
cpp-lib-build (windows-2022, clang, ON)	9m 52s
cpp-lib-build (windows-2022, clang, OFF)	13m 32s
cpp-lib-build (windows-2022, cl)	9m 22s
build (macos-11, tool)	2m 40s
build (macos-11, cpp)	40m 14s
build (macos-11, csharp)	12m 14s
build (macos-11, dart)	6m 52s
build (macos-11, go)	5m 10s
build (macos-11, java)	3m 21s
build (macos-11, javascript)	2m 52s
build (macos-11, typescript)	21m 39s
build (macos-11, php)	2m 27s
build (macos-11, python3)	2m 13s
build (ubuntu-20.04, tool)	1m 52s
build (ubuntu-20.04, cpp)	22m 12s
build (ubuntu-20.04, csharp)	11m 5s
build (ubuntu-20.04, dart)	7m 11s
build (ubuntu-20.04, go)	4m 30s
build (ubuntu-20.04, java)	2m 39s
build (ubuntu-20.04, javascript)	2m 59s
build (ubuntu-20.04, typescript)	23m 36s
build (ubuntu-20.04, php)	2m 44s
build (ubuntu-20.04, python3)	1m 33s
build (windows-2022, tool)	4m 27s
build (windows-2022, cpp)	30m 56s
build (windows-2022, csharp)	13m 6s
build (windows-2022, dart)	8m 8s
build (windows-2022, go)	11m 4s
build (windows-2022, java)	2m 49s
build (windows-2022, javascript)	3m 45s
build (windows-2022, typescript)	36m 4s
build (windows-2022, php)	3m 43s
build (windows-2022, python3)	2m 45s
	6h 19m 11s

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