workflows/release-sources: Disable building sub-project tarballs by default (#173441)

Sub-project tarbball creation has been disabled in the export.sh script
by default. It can be enabled by passing the --sub-project option. This
will not be used for official releases, but the option will allow users
to generate the sub-project tarballs themseleves if they want to.

https://discourse.llvm.org/t/rfc-do-something-with-the-subproject-tarballs-in-the-release-page/75024/

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Co-authored-by: Cullen Rhodes <cullen.rhodes@arm.com>
GitOrigin-RevId: 71a77dc043b22cfcff013eff1f0f4be15910cdf0
1 file changed