Nothing ever depended on libecpg_compat.so.3 in Fedora, so don't build
it now, at least till somebody explicitly requests that.

diff -ur postgresql-14.2_original/src/interfaces/ecpg/Makefile postgresql-14.2/src/interfaces/ecpg/Makefile
--- postgresql-14.2_original/src/interfaces/ecpg/Makefile	2022-02-23 09:31:24.000000000 +0100
+++ postgresql-14.2/src/interfaces/ecpg/Makefile	2022-02-23 10:30:19.000000000 +0100
@@ -2,7 +2,7 @@
 top_builddir = ../../..
 include $(top_builddir)/src/Makefile.global
 
-SUBDIRS = include pgtypeslib ecpglib compatlib preproc
+SUBDIRS = include pgtypeslib ecpglib preproc
 
 # Suppress parallel build of subdirectories to avoid a bug in GNU make 3.82, cf
 # https://savannah.gnu.org/bugs/?30653