Add IEEE 754 TiesToAway rounding mode #10897

Job	Run time
check-ubuntu-20_04-make-gcc	21m 30s
check-macos-13-make-clang	35m 18s
check-ubuntu-20_04-cmake-gcc	20m 48s
check-ubuntu-20_04-cmake-gcc-KNOWNBUG	6m 15s
check-ubuntu-20_04-cmake-gcc-THOROUGH	12m 33s
check-ubuntu-20_04-make-clang	26m 20s
check-ubuntu-20_04-make-clang-smt-z3	6m 24s
check-ubuntu-22_04-cmake-gcc	29m 50s
check-ubuntu-22_04-cmake-gcc-32bit	17m 46s
check-ubuntu-24_04-cmake-gcc-14	17m 4s
check-ubuntu-22_04-make-clang	22m 30s
check-docker-image	21m 59s
check-macos-14-cmake-clang	51m 43s
check-string-table	2m 13s
check-vs-2019-cmake-build-and-test	35m 38s
check-vs-2022-make-build-and-test	24m 2s
include-what-you-use	23m 3s
windows-msi-package	9m 41s
	6h 24m 37s

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