[2.2.0] Checkmk Werk 16887 created: mk_job: MK_VARDIR defaults not being set in bakery

Title: mk_job: MK_VARDIR defaults not being set in bakery Class: fix Compatible: compat Component: checks Date: 1721972847 Edition: cre Level: 1 Version: 2.2.0p32 Due to a different way to set in <code>MK_VARDIR</code> in <code>mk_job</code>, default values would not be baked into <code>mk_job</code> and derivates. This change adds a replacement rule for the way <code>MK_VARDIR</code> gets assigned in <code>mk_job</code> and also separates assignment and export in order to avoid known problems with Solaris.