test/openssl/test_pkey_dsa.rb: skip all tests in FIPS mode

It appears that the next version of OpenSSL running in the FIPS mode
will not support DSA key generation and signature generation. Although
it appears that FIPS 186-5 still allows signature verification, there
seems to be little point in writing such a specific test case.

DSA will still be tested on OpenSSL master if it is not operating in
the FIPS mode.

test_generate_on_non_fips is merged to test_generate again.

test/openssl/test_pkey_dsa.rb

@@ -4,6 +4,11 @@
 if defined?(OpenSSL) && defined?(OpenSSL::PKey::DSA)
 
 class OpenSSL::TestPKeyDSA < OpenSSL::PKeyTestCase
+  def setup
+    # May not be available in FIPS mode as DSA has been deprecated in FIPS 186-5
+    omit_on_fips
+  end
+
   def test_private
     key = Fixtures.pkey("dsa1024")
     assert_equal true, key.private?
@@ -31,6 +36,11 @@ def test_new_break
   def test_generate
     # DSA.generate used to call DSA_generate_parameters_ex(), which adjusts the
     # size of q according to the size of p
+    key1024 = OpenSSL::PKey::DSA.generate(1024)
+    assert_predicate key1024, :private?
+    assert_equal 1024, key1024.p.num_bits
+    assert_equal 160, key1024.q.num_bits
+
     key2048 = OpenSSL::PKey::DSA.generate(2048)
     assert_equal 2048, key2048.p.num_bits
     assert_equal 256, key2048.q.num_bits
@@ -42,17 +52,6 @@ def test_generate
     end
   end
 
-  def test_generate_on_non_fips
-    # DSA with 1024 bits is invalid on FIPS 186-4.
-    # https://github.com/openssl/openssl/commit/49ed5ba8f62875074f04417189147fd3dda072ab
-    omit_on_fips
-
-    key1024 = OpenSSL::PKey::DSA.generate(1024)
-    assert_predicate key1024, :private?
-    assert_equal 1024, key1024.p.num_bits
-    assert_equal 160, key1024.q.num_bits
-  end
-
   def test_sign_verify
     # The DSA valid size is 2048 or 3072 on FIPS.
     # https://github.com/openssl/openssl/blob/7649b5548e5c0352b91d9d3ed695e42a2ac1e99c/providers/common/securitycheck.c#L185-L188
@@ -135,8 +134,6 @@ def test_DSAPrivateKey
   end
 
   def test_DSAPrivateKey_encrypted
-    omit_on_fips
-
     # key = abcdef
     dsa512 = Fixtures.pkey("dsa512")
     pem = <<~EOF