Revert "Don't 'Requires: flatpak-session-helper' on RHEL"

The org.freedesktop.Flatpak D-Bus service provided by the
flatpak-session-helper RPM is not just needed to use containers created
by Toolbx < 0.0.97 [1,2].

It's needed on the host when toolbox(1) invocations inside a container
are forwarded to the host with 'flatpak-spawn --host ...'.  This has
been true since Toolbx >= 0.0.6 [3], and, hence, flatpak-session-helper
is needed on RHEL.

This reverts commit a8b4975b5c.

[1] Upstream commit 82c32bea742621a3
    https://github.com/containers/toolbox/commit/82c32bea742621a3
    https://github.com/containers/toolbox/pull/591
    https://github.com/containers/toolbox/issues/267

[2] Upstream commit 71b5c8c0a235249b
    https://github.com/containers/toolbox/commit/71b5c8c0a235249b
    https://github.com/containers/toolbox/pull/591
    https://github.com/containers/toolbox/issues/267

[3] Upstream commit 5b3d234c9e9ef45f
    https://github.com/containers/toolbox/commit/5b3d234c9e9ef45f
    https://github.com/containers/toolbox/pull/54

Resolves: RHEL-97099

toolbox.spec

@@ -33,7 +33,7 @@ Version:       0.1.1
 %endif
 %endif
 
-Release:       1%{?dist}
+Release:       2%{?dist}
 Summary:       Tool for interactive command line environments on Linux
 
 License:       Apache-2.0
@@ -91,11 +91,9 @@ Recommends:    fuse-overlayfs
 %endif
 
 Requires:      containers-common
+Requires:      flatpak-session-helper
 Requires:      podman >= 1.6.4
 Requires:      shadow-utils-subid%{?_isa}
-%if ! 0%{?rhel}
-Requires:      flatpak-session-helper
-%endif
 
 
 %description
@@ -210,6 +208,10 @@ install -m0644 %{SOURCE1} %{buildroot}%{_sysconfdir}/containers/%{name}.conf
 
 
 %changelog
+* Mon Jun 16 2025 Debarshi Ray <rishi@fedoraproject.org> - 0.1.1-2
+- Add 'Requires: flatpak-session-helper'
+Resolves: RHEL-97099
+
 * Fri Nov 01 2024 Debarshi Ray <rishi@fedoraproject.org> - 0.1.1-1
 - Update to 0.1.1
 Resolves: RHEL-61904