Removed canQueryTimeline check from mediaSequence ↔ tagIndex methods

[Jesse-calkin]

Description

This PR removes two unnecessary checks of canQueryTimeline in mediaSequence ↔ tagIndex methods, and adds two test to clarify the behavior of tagIndexes(forMediaSequence:)

Change Notes

• Removed call to canQueryTimeline in mediaSequence ↔ tagIndex methods.
• Added new test, testTagIndexesForVodPlaylist.
• Added new test, testTagIndexesForImpliedLivePlaylist.
• Added IDEDidComputeMac32BitWarning change to IDEWorkspaceChecks.plist.

Pre-submission Checklist

• [x] I ran the unit tests locally before checking in.
• [x] I made sure there were no new compiler warnings before checking in.
• [x] I have written useful documentation for all public code.
• [x] I have written unit tests for this new feature.

[dcoufal]

This fixes https://github.com/Comcast/mamba/issues/21