Stabilize tests some more

Tests added by commits 90eae926ab, 2bc7e886fc, bc32a12e0d
have occasionally failed, depending on timing.  Add some dependency
markers to the spec to try and remove the instability.

Author: Mihail Nikalayeu <mihailnikalayeu@gmail.com>
Discussion: https://postgr.es/m/202512041739.sgg3tb2yobe2@alvherre.pgsql

src/test/modules/injection_points/specs/reindex-concurrently-upsert-on-constraint.spec

@@ -85,7 +85,7 @@ step s4_wakeup_to_set_dead
 permutation
 	s3_setup_wait_before_set_dead
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s4_wakeup_to_set_dead
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s1
@@ -94,7 +94,7 @@ permutation
 permutation
 	s3_setup_wait_before_swap
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s4_wakeup_to_swap
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s2
@@ -103,7 +103,7 @@ permutation
 permutation
 	s3_setup_wait_before_set_dead
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s1
 	s4_wakeup_to_set_dead

src/test/modules/injection_points/specs/reindex-concurrently-upsert-partitioned.spec

@@ -88,7 +88,7 @@ step s4_wakeup_to_set_dead
 permutation
 	s3_setup_wait_before_set_dead
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s4_wakeup_to_set_dead
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s1
@@ -97,7 +97,7 @@ permutation
 permutation
 	s3_setup_wait_before_swap
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s4_wakeup_to_swap
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s2
@@ -106,7 +106,7 @@ permutation
 permutation
 	s3_setup_wait_before_set_dead
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s1
 	s4_wakeup_to_set_dead

src/test/modules/injection_points/specs/reindex-concurrently-upsert.spec

@@ -86,7 +86,7 @@ step s4_wakeup_to_set_dead
 permutation
 	s3_setup_wait_before_set_dead
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s4_wakeup_to_set_dead
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s1
@@ -95,7 +95,7 @@ permutation
 permutation
 	s3_setup_wait_before_swap
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s4_wakeup_to_swap
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s2
@@ -104,7 +104,7 @@ permutation
 permutation
 	s3_setup_wait_before_set_dead
 	s3_start_reindex(s1_start_upsert, s2_start_upsert)
-	s1_start_upsert
+	s1_start_upsert(s4_wakeup_s2)
 	s2_start_upsert(s1_start_upsert)
 	s4_wakeup_s1
 	s4_wakeup_to_set_dead