[JITLink][AArch32] Add test for ELF::R_ARM_THM_MOV{W_ABS_NC,T_ABS} (#70346)

Support for ELF::R_ARM_THM_MOVW_ABS_NC and ELF::R_ARM_THM_MOVT_ABS
was present but lacked tests. Test cases are similar to the ARM
versions of the relocations in ELF_static_arm_reloc.s.