ZTS: Disable zfs_share_concurrent_shares.sh

The cli_root/zfs_share/zfs_share_concurrent_shares test case is
reliably failing on the Fedora 37 and 38 builders.  Disable it.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

tests/runfiles/common.run

@@ -284,10 +284,11 @@ tests = ['cache_001_pos', 'cache_002_neg', 'canmount_001_pos',
     'zfs_set_feature_activation']
 tags = ['functional', 'cli_root', 'zfs_set']
 
+# Disabled - zfs_share_concurrent_shares
 [tests/functional/cli_root/zfs_share]
 tests = ['zfs_share_001_pos', 'zfs_share_002_pos', 'zfs_share_003_pos',
     'zfs_share_004_pos', 'zfs_share_006_pos', 'zfs_share_008_neg',
-    'zfs_share_010_neg', 'zfs_share_011_pos', 'zfs_share_concurrent_shares']
+    'zfs_share_010_neg', 'zfs_share_011_pos']
 tags = ['functional', 'cli_root', 'zfs_share']
 
 [tests/functional/cli_root/zfs_snapshot]