Set hide_floating_panes in parse_tab_node_with_template

[zhyuri]

Fixes #2974

Problem

When a layout has both default_tab_template and tabs with hide_floating_panes options, the hide_floating_panes is ignored.

Proposal

The change enables two features,

1. [fix] The hide_floating_panes option on the tab is respected when the layout sets default_tab_template.
2. [feat] The user can also set hide_floating_panes on default_tab_template which populates to all tabs.

Note: the hide_floating_panes on each tab takes precedence over the hide_floating_panes on the default_tab_template

Test

I reproduced the bug with the following layout from #2974 (comment) and verified the PR fixes the issue.

layout {
    default_tab_template {
        pane size=1 borderless=true {
            plugin location="zellij:tab-bar"
        }
        children
        pane size=2 borderless=true {
            plugin location="zellij:status-bar"
        }
    }

    tab hide_floating_panes=true {
        pane
        floating_panes {
            pane {
                x "10%"
                y "10%"
                width "80%"
                height "80%"
            }
        }
    }
}

[theogf]

That fixes a quite annoying issue, can we get that reviewed/merged?