[SPARC64] Do not assume the dest reg of R_SPARC_GOTDATA_OP is always %g1 #4830

Job	Run time
build-asan-tsan	12m 49s
build-asan-tsan (-DMOLD_USE_ASAN=On)	16m 23s
build-msan	23m 10s
build-multi-archs	24m 11s
build-asan-tsan (-DMOLD_USE_TSAN=On)	29m 29s
build-macos	6m 35s
build-distros (alpine)	19m 8s
build-distros (opensuse/tumbleweed)	14m 21s
build-distros (debian:11)	12m 47s
build-distros (ubuntu:22.04)	24m 10s
build-freebsd	19m 32s
build-distros (gentoo/stage3)	22m 59s
build-distros (fedora)	13m 55s
build-distros (archlinux)	19m 49s
build-distros (ubuntu:25.04)	14m 59s
build-windows	26m 4s
build-msys	13m 44s
	5h 14m 5s

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