Use the same rpaths for tests and binaries and cc and rust

Rust and cc binaries currently use $ORIGIN/lib64:$ORIGIN/../lib64 as the
rpath, and cc tests add $ORIGIN/../../lib64:$ORIGIN/../../../$ORIGIN:$ORIGIN.
This causes problems when a binary is included as test data in
out/host/linux-x86/testcases/<test dir>/<CPU>/<test>, as the
binaries can't find the libraries in out/host/linux-x86/lib64.

Use the same rpath for test and binaries, and for cc and rust.

Bug: 264604160
Test: m USE_HOST_MUSL=true out/host/linux-x86/testcases/acpi_tables_test_src_lib/x86_64/acpi_tables_test_src_lib && out/host/linux-x86/testcases/acpi_tables_test_src_lib/x86_64/acpi_tables_test_src_lib
Test: m USE_HOST_MUSL=true out/host/linux-x86/testcases/gen_sdk_test/x86_64/gen_sdk_test && out/host/linux-x86/testcases/gen_sdk_test/x86_64/toybox
Change-Id: I10fe5dc0de01d1f3c6aea8dbabbf60edab5989c3