Rails test runner (#2687)

* [rails] update psych for rails 7.1+

* [rails] update dummy app's constant

* [rails] add bin/test

Author: solnic

.gitignore

@@ -19,3 +19,4 @@ node_modules
 
 .devcontainer/.env
 vendor/gems
+sentry-rails/Gemfile-*.lock

sentry-rails/Gemfile

@@ -36,6 +36,7 @@ if rails_version >= Gem::Version.new("8.0.0")
   gem "rspec-rails"
   gem "sqlite3", "~> 2.1.1", platform: :ruby
 elsif rails_version >= Gem::Version.new("7.1.0")
+  gem "psych", "~> 4.0.0"
   gem "rspec-rails"
   gem "sqlite3", "~> 1.7.3", platform: :ruby
 elsif rails_version >= Gem::Version.new("6.1.0")
@@ -49,7 +50,6 @@ elsif rails_version >= Gem::Version.new("6.1.0")
 else
   gem "psych", "~> 3.0.0"
   gem "rspec-rails", "~> 4.0"
-  gem "psych", "~> 3.0.0"
 
   if rails_version >= Gem::Version.new("6.0.0")
     gem "sqlite3", "~> 1.4.0", platform: :ruby