Fix: pgcrypto regression test failures on Rocky 8

This commit fixes two issues preventing the `ic-contrib` regression
tests from passing on Rocky Linux 8 environments (FIPS enabled).

1. Fixed regex matching for "Some PX error": The previous `init_file`
   rule missed a space in the error message pattern (`ERROR:  Cannot
   use...`), causing FIPS error masking to fail. Added the missing space
   to correctly match the output.

2. Masked ephemeral line numbers: Different compilation environments
   (Rocky 8 vs 9) produce different line number references in error
   messages (e.g., pgcrypto.c:213 vs 215).  Added `matchsubs` rules to
   mask these line numbers with `(pgcrypto.c:XXX)` and updated
   `expected/fips_2.out` to match, ensuring consistent test results
   across platforms.

Changes:
* Modified src/test/regress/init_file
* Updated contrib/pgcrypto/expected/fips_2.out

See: #1539

Author: tuhaihe

contrib/pgcrypto/expected/fips_2.out

@@ -55,25 +55,25 @@ SELECT 'Test gen_salt : EXPECTED FAIL FIPS' as comment;
 (1 row)
 
 UPDATE fipstest SET salt = gen_salt('md5');
-ERROR:  requested functionality not allowed in FIPS mode (pgcrypto.c:213)
+ERROR:  requested functionality not allowed in FIPS mode (pgcrypto.c:XXX)
 SELECT 'Test crypt : EXPECTED FAIL FIPS' as comment;
              comment             
 ---------------------------------
  Test crypt : EXPECTED FAIL FIPS
 (1 row)
 
 UPDATE fipstest SET res = crypt(data, salt);
-ERROR:  requested functionality not allowed in FIPS mode (pgcrypto.c:266)
+ERROR:  requested functionality not allowed in FIPS mode (pgcrypto.c:XXX)
 SELECT res = crypt(data, res) AS "worked" FROM fipstest;
-ERROR:  requested functionality not allowed in FIPS mode (pgcrypto.c:266)
+ERROR:  requested functionality not allowed in FIPS mode (pgcrypto.c:XXX)
 SELECT 'Test pgp : EXPECTED PASS' as comment;
          comment          
 --------------------------
  Test pgp : EXPECTED PASS
 (1 row)
 
 select pgp_sym_decrypt(pgp_sym_encrypt('santa clause', 'mypass', 'cipher-algo=aes256'), 'mypass');
-ERROR:  requested functionality not allowed in FIPS mode (openssl.c:772)
+ERROR:  requested functionality not allowed in FIPS mode (openssl.c:XXX)
 SELECT 'Test pgp : EXPECTED FAIL FIPS' as comment;
             comment            
 -------------------------------
@@ -89,13 +89,13 @@ SELECT 'Test raw encrypt : EXPECTED PASS' as comment;
 (1 row)
 
 SELECT encrypt('santa claus', 'mypass', 'aes') as raw_aes;
-ERROR:  requested functionality not allowed in FIPS mode (openssl.c:772)
+ERROR:  requested functionality not allowed in FIPS mode (openssl.c:XXX)
 SELECT 'Test raw encrypt : EXPECTED FAIL FIPS' as comment;
                 comment                
 ---------------------------------------
  Test raw encrypt : EXPECTED FAIL FIPS
 (1 row)
 
 SELECT encrypt('santa claus', 'mypass', 'bf') as raw_blowfish;
-ERROR:  requested functionality not allowed in FIPS mode (openssl.c:772)
+ERROR:  requested functionality not allowed in FIPS mode (openssl.c:XXX)
 DROP TABLE fipstest;

src/test/regress/init_file

@@ -134,8 +134,14 @@ s/ERROR:  FIPS enabled OpenSSL is required for strict FIPS mode .*/ERROR:  FIPS
 # Mask out OpenSSL behavior change in different version
 m/ERROR:  Cannot use "md5": No such hash algorithm/
 s/ERROR:  Cannot use "md5": No such hash algorithm/ERROR:  Cannot use "md5": /
-m/ERROR: Cannot use "md5": Some PX error \(not specified\)/
-s/ERROR: Cannot use "md5": Some PX error \(not specified\)/ERROR:  Cannot use "md5": /
+m/ERROR:  Cannot use "md5": Some PX error \(not specified\)/
+s/ERROR:  Cannot use "md5": Some PX error \(not specified\)/ERROR:  Cannot use "md5": /
+
+# Mask out FIPS error line numbers
+m/ERROR:  requested functionality not allowed in FIPS mode \(pgcrypto.c:\d+\)/
+s/ERROR:  requested functionality not allowed in FIPS mode \(pgcrypto.c:\d+\)/ERROR:  requested functionality not allowed in FIPS mode (pgcrypto.c:XXX)/
+m/ERROR:  requested functionality not allowed in FIPS mode \(openssl.c:\d+\)/
+s/ERROR:  requested functionality not allowed in FIPS mode \(openssl.c:\d+\)/ERROR:  requested functionality not allowed in FIPS mode (openssl.c:XXX)/
 
 # Mask out gp_execution_segment()
 m/One-Time Filter: \(gp_execution_segment\(\) = \d+/