Replace OpenSSL constants with strings

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

ee/changelogs/unreleased/Lint-DeprecatedOpenSSLConstant-ee.yml

+---
+title: Replace OpenSSL constants with strings
+merge_request: 52431
+author: Takuya Noguchi
+type: other

ee/lib/gitlab/geo/oauth/logout_state.rb

@@ -64,7 +64,7 @@ module Gitlab
         end
 
         def with_cipher(auth_tag = nil)
-          cipher = OpenSSL::Cipher::AES256.new(:GCM)
+          cipher = OpenSSL::Cipher.new('AES-256-GCM')
 
           yield cipher
 

ee/spec/lib/gitlab/geo/oauth/logout_state_spec.rb

@@ -22,7 +22,7 @@ RSpec.describe Gitlab::Geo::Oauth::LogoutState do
     end
 
     it 'returns nil when encryption fails' do
-      allow_next_instance_of(OpenSSL::Cipher::AES256) do |instance|
+      allow_next_instance_of(OpenSSL::Cipher) do |instance|
         allow(instance).to receive(:final) { raise OpenSSL::OpenSSLError }
       end
 
@@ -78,7 +78,7 @@ RSpec.describe Gitlab::Geo::Oauth::LogoutState do
     end
 
     it 'returns nil when decryption fails' do
-      allow_next_instance_of(OpenSSL::Cipher::AES256) do |instance|
+      allow_next_instance_of(OpenSSL::Cipher) do |instance|
         allow(instance).to receive(:final) { raise OpenSSL::OpenSSLError }
       end