For tarball source: show tarball filename, download URL, and actual
SHA256 values with "(SHA matches expected value)" suffix, or
"expected SHA not known, please update workflow .yml" when no SHA is
known. The Tcl ref is omitted since it is derived and not user-supplied.
For github source: show clone URL, ref, and resolved commit-id/date.
Tarball and SHA rows are omitted as they are not relevant.
The TCL/TK BUILD INFO section in Create RELEASE-NOTES.txt is updated
with the same conditional logic using the exported env vars.
The TCL_SHA_STATUS env var is removed (replaced by per-SHA display
logic and the new TCL_TARBALL_FILENAME / TK_TARBALL_FILENAME vars).
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
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