[Easy] Update Cargo commands to use --workspace instead of --all

[nlordell]

Just update the cargo commands since --all is deprecated. From the help:

$ cargo build --help
# ...
        --all                        Alias for --workspace (deprecated)
        --workspace                  Build all packages in the workspace
# ...

Note that cargo fmt does not support the --workspace flag and --all actually has different semantics to --workspace for other cargo commands. Currently, cargo fmt already formats all packages in the workspace, the --all flag additionally formats packages that are imported via path and are outside of the workspace (see discussion here). So, for this PR we also remove the --all flag as it superfluous.

Test plan

CI