tests: skip vmx tests when ESX is disabled

Since the recent change:

  commit f82d30307d
  Author: Michal Prívozník <mprivozn@redhat.com>
  Date:   Fri Nov 14 10:35:14 2025 +0100

    vmx2xmltest: Drop custom file name parse function

The VMX parsing uses the esxParseVMXFileName() function in
the ESX library. This is unavailable when the ESX driver is
disabled, so the tests must be skipped too.

Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

tests/meson.build

@@ -548,7 +548,7 @@ if conf.has('WITH_VMWARE')
   ]
 endif
 
-if conf.has('WITH_VMX')
+if conf.has('WITH_VMX') and conf.has('WITH_ESX')
   tests += [
     { 'name': 'vmx2xmltest', 'include': [ esx_inc_dir ], 'link_with': [ esx_lib ] },
     { 'name': 'xml2vmxtest' },