Refactor dialog actions

[dwmkerr]

• Remove duplication around dialog actions.
• Add a manual test script.
• Fix a bug with the test:debug action, which wouldn't find nested tests.
• Fix the Lambda Policy, which was not allowing the lambda function to write logs to CloudWatch (which is the default behaviour).

This pull request reduces duplication by removing some of the common code around dialog actions. This is step 1. For step 2, we'll remove duplication in the confirmation code and then return the old dialogActions in favour of dialog.

[mindmelting]

Codecov Report

Merging #116 into master will decrease coverage by 4.16%. The diff coverage is 82.81%.

@@            Coverage Diff             @@
##           master     #116      +/-   ##
==========================================
- Coverage   88.71%   84.54%   -4.17%     
==========================================
  Files          46       48       +2     
  Lines         629      634       +5     
==========================================
- Hits          558      536      -22     
- Misses         71       98      +27

Impacted Files	Coverage Δ
oscarbot/utils/dialog/failed.js	100% <ø> (+66.66%)	:arrow_up:
oscarbot/utils/dialogActions.js	11.11% <ø> (-16.17%)	:arrow_down:
oscarbot/intents/countOpenPRs.js	100% <100%> (ø)	:arrow_up:
oscarbot/intents/countIssues.js	100% <100%> (ø)	:arrow_up:
oscarbot/intents/whatProjectsAmIWorkingOn.js	100% <100%> (ø)	:arrow_up:
oscarbot/utils/dialog/index.js	100% <100%> (ø)
oscarbot/utils/dialog/fulfilled.js	100% <100%> (ø)
oscarbot/intents/whatCanIAskYou.js	100% <100%> (ø)	:arrow_up:
oscarbot/intents/myOpenIssues.js	100% <100%> (ø)	:arrow_up:
oscarbot/intents/whatAreMyMostPopularProjects.js	100% <100%> (ø)	:arrow_up:
... and 18 more

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[dwmkerr]

thanks for fixing the debugger issue