Failing tests when extra RUSTFLAGS are set

[Kladki]

When attempting to build the two most recent releases, the compile::tests::test_workspace_project1 and compile::tests::test_project_dev tests fail because they expect the RUSTFLAGS env variable to be set to exactly --cfg erase_components, so when Alpine Linux builders add extra flags like -Clink-arg=-Wl,-z,pack-relative-relocs the tests fail. Ideally, the tests would only check if the RUSTFLAG contain --cfg erase_components, rather than having to match them exactly.