Skip FIPS tests if FIPS is unconfigured

When built against OpenSSL 3 with the enable-fips option, the FIPS
shared library can be loaded, but unless the system administrator has
run openssl fipsinstall and modified the OpenSSL configuration, FIPS
mode will still fail with an error message saying it is missing config
data.

Since this does not indicate a problem with stunnel's code, but with the
underlying OpenSSL setup, skip the test if this occurs. This is the same
behavior when running against a copy of OpenSSL 3.x that was not built with
'enable-fips'.
diff -up stunnel-5.61/tests/plugins/p10_fips.py.fips-tests stunnel-5.61/tests/plugins/p10_fips.py
--- stunnel-5.61/tests/plugins/p10_fips.py.fips-tests	2022-01-12 11:40:11.121241545 +0100
+++ stunnel-5.61/tests/plugins/p10_fips.py	2022-01-12 11:45:01.791364483 +0100
@@ -29,7 +29,8 @@ class FIPSTest(StunnelTest):
         self.events.skip = [
             "FIPS provider not available",
             "fips mode not supported",
-            r"FIPS PROVIDER.*could not load the shared library"
+            r"FIPS PROVIDER.*could not load the shared library",
+            r"FIPS PROVIDER.*missing config data"
         ]
         self.events.failure = [
             "peer did not return a certificate",
diff -up stunnel-5.61/tests/plugins/p11_fips_cipher.py.fips-tests stunnel-5.61/tests/plugins/p11_fips_cipher.py
--- stunnel-5.61/tests/plugins/p11_fips_cipher.py.fips-tests	2022-01-12 11:40:16.192330329 +0100
+++ stunnel-5.61/tests/plugins/p11_fips_cipher.py	2022-01-12 11:52:22.159227499 +0100
@@ -30,7 +30,8 @@ class FailureCipherFIPS(StunnelTest):
         self.events.skip = [
             "FIPS provider not available",
             "fips mode not supported",
-            r"FIPS PROVIDER.*could not load the shared library"
+            r"FIPS PROVIDER.*could not load the shared library",
+            r"FIPS PROVIDER.*missing config data"
         ]
         self.events.count = 1
         self.events.success = [
@@ -86,7 +87,8 @@ class FailureCiphersuitesFIPS(StunnelTes
         self.events.skip = [
             "FIPS provider not available",
             "fips mode not supported",
-            r"FIPS PROVIDER.*could not load the shared library"
+            r"FIPS PROVIDER.*could not load the shared library",
+            r"FIPS PROVIDER.*missing config data"
         ]
         self.events.count = 1
         self.events.success = [
@@ -145,7 +147,8 @@ class FailureEllipticCurveFIPS(StunnelTe
         self.events.skip = [
             "FIPS provider not available",
             "fips mode not supported",
-            r"FIPS PROVIDER.*could not load the shared library"
+            r"FIPS PROVIDER.*could not load the shared library",
+            r"FIPS PROVIDER.*missing config data"
         ]
         self.events.count = 1
         self.events.success = [