Remove command line regexes from Kokoro scripts.

Under a recent update, these files can be edited in Google3 and "re-imported" without moving them around. This is configured by using `FileSource` rather than `KokoroSource`. This cleans up copies which are not needed anymore.

Change-Id: Ie3a5841d7519d4f26cc44ec4605b148f7a9e531c

kokoro/build_binaries_oak_containers.sh

@@ -27,7 +27,6 @@ touch "${KOKORO_ARTIFACTS_DIR}/binaries/git_commit_${KOKORO_GIT_COMMIT_oak:?}"
 readonly generated_binaries=(
     ./target/stage1.cpio
     ./oak_containers_kernel/target/bzImage
-    ./oak_containers_kernel/cmd_line_regex.txt
     ./oak_containers_orchestrator/target/oak_containers_orchestrator
     ./oak_containers_syslogd/target/oak_containers_syslogd_patched
     ./oak_containers_system_image/target/image.tar.xz
@@ -38,7 +37,6 @@ readonly generated_binaries=(
 readonly binary_names=(
     oak_containers_stage1
     oak_containers_kernel
-    oak_containers_kernel_cmd_line_regex
     oak_containers_orchestrator
     oak_containers_syslogd
     oak_containers_system_image

kokoro/build_binaries_rust.sh

@@ -21,7 +21,6 @@ touch "${KOKORO_ARTIFACTS_DIR}/binaries/git_commit_${KOKORO_GIT_COMMIT_oak:?}"
 # the creation time.
 readonly generated_binaries=(
     ./oak_restricted_kernel_wrapper/target/x86_64-unknown-none/release/oak_restricted_kernel_simple_io_init_rd_wrapper_bin
-    ./oak_restricted_kernel_wrapper/cmd_line_regex.txt
     ./stage0_bin/target/x86_64-unknown-none/release/stage0_bin
     ./enclave_apps/target/x86_64-unknown-none/release/key_xor_test_app
     ./enclave_apps/target/x86_64-unknown-none/release/oak_echo_enclave_app
@@ -32,7 +31,6 @@ readonly generated_binaries=(
 )
 readonly binary_names=(
     oak_restricted_kernel_simple_io_init_rd_wrapper_bin
-    oak_restricted_kernel_simple_io_wrapper_cmd_line_regex
     stage0_bin
     key_xor_test_app
     oak_echo_enclave_app