ci: disable remote execution testing
Hitting an error with `zig`: exec external/hermetic_cc_toolchain~3.0.0~toolchains~zig_sdk/tools/aarch64-linux-gnu.2.28/c++: exec format error
Hitting an error with `zig`: exec external/hermetic_cc_toolchain~3.0.0~toolchains~zig_sdk/tools/aarch64-linux-gnu.2.28/c++: exec format error