Revert all new recent changes to add PGXS options for TAP and isolation

A set of failures in buildfarm machines are proving that this is not
quite ready yet because of another set of issues:
- MSVC scripts assume that REGRESS_OPTS can only use top_builddir.  Some
test suites actually finish by using top_srcdir, like pg_stat_statements
which cause the regression tests to never run.
- Trying to enforce top_builddir does not work either when using VPATH
as this is not recognized properly.
- TAP tests of bloom are unstable on various platforms, causing various
failures.

src/test/modules/brin/.gitignore

@@ -1,3 +1,3 @@
 # Generated subdirectories
-/output_iso/
+/isolation_output/
 /tmp_check/

src/test/modules/brin/Makefile

@@ -1,9 +1,12 @@
 # src/test/modules/brin/Makefile
 
-EXTRA_INSTALL = contrib/pageinspect
+# Note: because we don't tell the Makefile there are any regression tests,
+# we have to clean those result files explicitly
+EXTRA_CLEAN = $(pg_regress_clean_files) ./isolation_output
 
-ISOLATION = summarization-and-inprogress-insertion
-TAP_TESTS = 1
+EXTRA_INSTALL=contrib/pageinspect
+
+ISOLATIONCHECKS=summarization-and-inprogress-insertion
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -15,3 +18,19 @@ top_builddir = ../../../..
 include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
+
+check: isolation-check prove-check
+
+isolation-check: | submake-isolation temp-install
+	$(MKDIR_P) isolation_output
+	$(pg_isolation_regress_check) \
+	    --outputdir=./isolation_output \
+	    $(ISOLATIONCHECKS)
+
+prove-check: | temp-install
+	$(prove_check)
+
+.PHONY: check isolation-check prove-check
+
+submake-isolation:
+	$(MAKE) -C $(top_builddir)/src/test/isolation all

src/test/modules/commit_ts/Makefile

@@ -2,7 +2,6 @@
 
 REGRESS = commit_timestamp
 REGRESS_OPTS = --temp-config=$(top_srcdir)/src/test/modules/commit_ts/commit_ts.conf
-TAP_TESTS = 1
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -14,3 +13,8 @@ top_builddir = ../../../..
 include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
+
+check: prove-check
+
+prove-check: | temp-install
+	$(prove_check)

src/test/modules/snapshot_too_old/Makefile

@@ -4,12 +4,7 @@
 # we have to clean those result files explicitly
 EXTRA_CLEAN = $(pg_regress_clean_files)
 
-ISOLATION = sto_using_cursor sto_using_select sto_using_hash_index
-ISOLATION_OPTS = --temp-config $(top_srcdir)/src/test/modules/snapshot_too_old/sto.conf
-
-# Disabled because these tests require "old_snapshot_threshold" >= 0, which
-# typical installcheck users do not have (e.g. buildfarm clients).
-NO_INSTALLCHECK = 1
+ISOLATIONCHECKS=sto_using_cursor sto_using_select sto_using_hash_index
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -22,7 +17,31 @@ include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
 
+# Disabled because these tests require "old_snapshot_threshold" >= 0, which
+# typical installcheck users do not have (e.g. buildfarm clients).
+installcheck:;
+
 # But it can nonetheless be very helpful to run tests on preexisting
 # installation, allow to do so, but only if requested explicitly.
-installcheck-force:
-	$(pg_isolation_regress_installcheck) $(ISOLATION)
+installcheck-force: isolationcheck-install-force
+
+check: isolationcheck
+
+submake-isolation:
+	$(MAKE) -C $(top_builddir)/src/test/isolation all
+
+submake-test_snapshot_too_old:
+	$(MAKE) -C $(top_builddir)/src/test/modules/snapshot_too_old
+
+isolationcheck: | submake-isolation submake-test_snapshot_too_old temp-install
+	$(pg_isolation_regress_check) \
+	    --temp-config $(top_srcdir)/src/test/modules/snapshot_too_old/sto.conf \
+	    $(ISOLATIONCHECKS)
+
+isolationcheck-install-force: all | submake-isolation submake-test_snapshot_too_old temp-install
+	$(pg_isolation_regress_installcheck) \
+	    $(ISOLATIONCHECKS)
+
+.PHONY: check submake-test_snapshot_too_old isolationcheck isolationcheck-install-force
+
+temp-install: EXTRA_INSTALL=src/test/modules/snapshot_too_old

src/test/modules/test_pg_dump/Makefile

@@ -7,7 +7,6 @@ EXTENSION = test_pg_dump
 DATA = test_pg_dump--1.0.sql
 
 REGRESS = test_pg_dump
-TAP_TESTS = 1
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -19,3 +18,8 @@ top_builddir = ../../../..
 include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
+
+check: prove-check
+
+prove-check: | temp-install
+	$(prove_check)