Rename the patch files for the semver test (#10966)

## Problem
The patch for `semver` extensions relies on `PG_VERSION` environment
variable. The files were named without the letter `v` so script cannot
find them.
## Summary of changes
The patch files were renamed.

docker-compose/ext-src/pg_semver-src/test-upgrade-v17.patch

@@ -0,0 +1,24 @@
+diff --git a/test/sql/base.sql b/test/sql/base.sql
+index 53adb30..2eed91b 100644
+--- a/test/sql/base.sql
++++ b/test/sql/base.sql
+@@ -2,7 +2,6 @@
+ BEGIN;
+ 
+ \i test/pgtap-core.sql
+-CREATE EXTENSION semver;
+ 
+ SELECT plan(334);
+ --SELECT * FROM no_plan();
+diff --git a/test/sql/corpus.sql b/test/sql/corpus.sql
+index c0fe98e..39cdd2e 100644
+--- a/test/sql/corpus.sql
++++ b/test/sql/corpus.sql
+@@ -4,7 +4,6 @@ BEGIN;
+ -- Test the SemVer corpus from https://regex101.com/r/Ly7O1x/3/.
+ 
+ \i test/pgtap-core.sql
+-CREATE EXTENSION semver;
+ 
+ SELECT plan(76);
+ --SELECT * FROM no_plan();