Run RuboCop in GitHub Actions

[yahonda]

This commit runs RuboCop in GitHub Actions.

• Create :rubocop group in Gemfile
  Add BUNDLE_ONLY available since Bundler 2.3.19
  https://github.com/rubygems/rubygems/blob/master/bundler/CHANGELOG.md#2319-july-27-2022
• Use Ruby 3.4
• No need to install Oracle Instant Client to run RuboCop
• Address these offenses as a separate commit

$ bundle exec rubocop -a
Inspecting 73 files
...................W.......C..............CC.............................

Offenses:

lib/active_record/connection_adapters/oracle_enhanced/quoting.rb:49:13: C: [Corrected] Layout/IndentationWidth: Use 2 (not 32) spaces for indentation.
                                            "\"#{name.upcase}\""
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
lib/active_record/connection_adapters/oracle_enhanced/quoting.rb:50:43: C: [Corrected] Layout/ElseAlignment: Align else with QUOTED_COLUMN_NAMES[name].
                                          else
                                          ^^^^
lib/active_record/connection_adapters/oracle_enhanced/quoting.rb:51:45: C: [Corrected] Layout/CommentIndentation: Incorrect indentation detected (column 44 instead of 14).
                                            # remove double quotes which cannot be used inside quoted identifier
                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
lib/active_record/connection_adapters/oracle_enhanced/quoting.rb:52:13: C: [Corrected] Layout/IndentationWidth: Use 2 (not 32) spaces for indentation.
                                            "\"#{name.delete('"')}\""
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
lib/active_record/connection_adapters/oracle_enhanced/quoting.rb:53:43: W: [Corrected] Layout/EndAlignment: end at 53, 42 is not aligned with QUOTED_COLUMN_NAMES[name] ||= if at 48, 12.
                                          end
                                          ^^^
lib/active_record/connection_adapters/oracle_enhanced/quoting.rb:60:1: C: [Corrected] Layout/EmptyLinesAroundModuleBody: Extra empty line detected at module body end.
lib/active_record/connection_adapters/oracle_enhanced/quoting.rb:110:1: C: [Corrected] Layout/EmptyLines: Extra blank line detected.
lib/active_record/connection_adapters/oracle_enhanced_adapter.rb:66:1: C: [Corrected] Layout/EmptyLinesAroundModuleBody: Extra empty line detected at module body beginning.
lib/arel/visitors/oracle_common.rb:6:1: C: [Corrected] Layout/EmptyLinesAroundModuleBody: Extra empty line detected at module body beginning.
spec/active_record/connection_adapters/emulation/oracle_adapter_spec.rb:13:86: C: [Corrected] Style/StringLiterals: Prefer double-quoted strings unless you need single quotes to avoid extra backslashes for escaping.
    @conn = ActiveRecord::Base.establish_connection(CONNECTION_PARAMS.merge(adapter: 'oracle'))
                                                                                     ^^^^^^^^

73 files inspected, 10 offenses detected, 10 offenses corrected
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