bug#33989: 27.0.50; master: Tcl indentation broken

[Benjamin Riefenstahl]

Commit cd5bb4bf3d "Fix two tcl-mode defun-related bugs" breaks
indentation of Tcl code for me outside of procs.  Consider:

fooBaz {
    |
}

Where the | indicates the expected indentation.  But on current master
pressing TAB instead goes to the beginning of the line.  Given that it
is common in Tcl to have code on the global level of a script, this is
not what I expect and want.

Reproduced with current master and "emacs -Q".