Disable flag --incompatible_string_join_requires_strings
Disable flag --incompatible_string_join_requires_strings

The default will change in Starlark interpreter. This line allows Copybara
to do the migration separately.

See https://github.com/bazelbuild/bazel/issues/7802 for details

PiperOrigin-RevId: 249818361
Change-Id: I45b316121083ee5c5895230858c584cb4b2b74f6

google/copybara,google/copybara,google/copybara