[LoongArch64] add the coreclr/pal directory (#62887)

[LoongArch64] add the coreclr/pal directory (#62887)

* [LoongArch64] add the coreclr/pal and libunwind directory. (#59561)

* [LoongArch64] delete the libunwind for LoongArch64.
It will be commited within a new PR.

* [LoongArch64] add config files from #62889.

* [LoongArch64] revert some files when moved from #62889.

* [LoongArch64] compiling is sucessfully.

* [LoongArch64] delete the define IMAGE_FILE_MACHINE_LOONGARCH64 for #62886.

* [LoongArch64] exclude some files from pal directory.

* [LoongArch64] rename the `UNW_LOONGARCH_*` with `UNW_LOONGARCH64_*`

* [LoongArch64] update the version of the `LICENSE description`.

* [LoongArch64] revert the `pal/inc/rt/ntimage.h`.

* [LoongArch64] delete unused assert and update the `DAC_CS_NATIVE_DATA_SIZE`

Co-authored-by: qiaopengcheng <qiaopengcheng-hf@loongson.cn>