bug#10601: 24.0.92; Visiting tgz files sets mode from File Local Variables

[Juri Linkov]

When the last file in a tzg archive ends with the Local Variables section
where mode is specified (for the last file in the archive), then the whole
archive is visited in that mode instead of using `tar-mode'.

This is a regression caused by fixing bug#8586.

There are variables `inhibit-first-line-modes-regexps' and
`inhibit-first-line-modes-suffixes' that prevent getting mode from the
Local Variables section for tzg archives and other such file types.
But currently they are used to skip only scanning of the first -*- line.

To fix this regression, it is necessary to use these variables
to skip getting mode from the Local Variables section.