sorbet: Start typechecking install.rb and reinstall.rb

Library/Homebrew/sorbet/files.yaml

@@ -241,7 +241,6 @@ false:
   - ./formula_versions.rb
   - ./formulary.rb
   - ./global.rb
-  - ./install.rb
   - ./keg.rb
   - ./keg_relocate.rb
   - ./language/node.rb
@@ -266,7 +265,6 @@ false:
   - ./pkg_version.rb
   - ./postinstall.rb
   - ./readall.rb
-  - ./reinstall.rb
   - ./requirement.rb
   - ./requirements/arch_requirement.rb
   - ./requirements/codesign_requirement.rb
@@ -879,6 +877,7 @@ true:
   - ./formula_support.rb
   - ./hardware.rb
   - ./help.rb
+  - ./install.rb
   - ./install_renamed.rb
   - ./language/go.rb
   - ./language/java.rb
@@ -895,6 +894,7 @@ true:
   - ./os/linux.rb
   - ./os/linux/glibc.rb
   - ./os/linux/kernel.rb
+  - ./reinstall.rb
   - ./rubocops/cask/ast/cask_header.rb
   - ./rubocops/cask/ast/stanza.rb
   - ./rubocops/cask/constants/stanza.rb

Library/Homebrew/sorbet/rbi/homebrew.rbi

@@ -12,6 +12,10 @@ module Homebrew::Fetch
   def args; end
 end
 
+module Homebrew::Install
+  include Kernel
+end
+
 module Language::Perl::Shebang
   include Kernel
 end