PERF: bypass slow locale lookups in various cases

Previously as soon as any override was defined we would regress to the slow
path for locale lookups. Additionally if `raise: true` was specified which
rails likes to add in views we would bypass the cache

The new design manages to use the fast path for many more cases

spec/components/freedom_patches/translate_accelerator_spec.rb

@@ -24,6 +24,15 @@ describe "translate accelerator" do
     expect(override.persisted?).to eq(true)
   end
 
+  it "supports raising if requested, and cache bypasses" do
+    expect { I18n.t('i_am_an_unknown_key99', raise: true) }.to raise_error(I18n::MissingTranslationData)
+
+    orig = I18n.t('i_am_an_unknown_key99')
+
+    expect(I18n.t('i_am_an_unknown_key99').object_id).to eq(orig.object_id)
+    expect(I18n.t('i_am_an_unknown_key99')).to eq("translation missing: en_US.i_am_an_unknown_key99")
+  end
+
   it "overrides for both string and symbol keys" do
     key = 'user.email.not_allowed'
     text_overriden = 'foobar'
@@ -124,6 +133,7 @@ describe "translate accelerator" do
       I18n.overrides_disabled do
         expect(I18n.t('title')).to eq(orig_title)
       end
+
       expect(I18n.t('title')).to eq('overridden title')
     end