[Fix rubocop#8842] Debug outputs cache used info

* When rubocop is ran in debug mode (`--debug`) and rubocop uses a cache, output the location of cache used. (This is to inform about possible differences between runs..)
* Encourage users submitting bugs to use debug mode.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -23,6 +23,7 @@ Describe here how you expected RuboCop to behave in this particular situation.
 ## Actual behavior
 
 Describe here what actually happened.
+Please use `rubocop --debug` when pasting rubocop output as it contains additional information.
 
 ## Steps to reproduce the problem
 

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 * [#8796](https://github.com/rubocop-hq/rubocop/pull/8796): Add new `Lint/HashCompareByIdentity` cop. ([@fatkodima][])
 * [#8668](https://github.com/rubocop-hq/rubocop/pull/8668): Add new `Lint/RedundantSafeNavigation` cop. ([@fatkodima][])
+* [#8842](https://github.com/rubocop-hq/rubocop/issues/8842): Add notification about cache being used to debug mode. ([@hatkyinc2][])
 
 ### Bug fixes
 
@@ -4952,3 +4953,4 @@
 [@pbernays]: https://github.com/pbernays
 [@rdunlop]: https://github.com/rdunlop
 [@ghiculescu]: https://github.com/ghiculescu
+[@hatkyinc2]: https://github.com/hatkyinc2

lib/rubocop/result_cache.rb

@@ -95,13 +95,19 @@ def initialize(file, team, options, config_store, cache_root = nil)
                         context_checksum(team, options),
                         file_checksum(file, config_store))
       @cached_data = CachedData.new(file)
+      @debug = options[:debug]
+    end
+
+    def debug?
+      @debug
     end
 
     def valid?
       File.exist?(@path)
     end
 
     def load
+      puts "Loading cache from #{@path}" if debug?
       @cached_data.from_json(IO.read(@path, encoding: Encoding::UTF_8))
     end