Consolidate add with install in DM and allow multiple dependency installation

[chasefleming]

Closes #1755

Description

Consolidate add with install in Dependency Manager and allow for multiple dependency installs. e.g. can now do flow dependencies install FlowToken NonFungibleToken

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 8.51064% with 43 lines in your changes missing coverage. Please review.

Project coverage is 27.90%. Comparing base (c73ef4e) to head (ffc5d9a).

Files with missing lines	Patch %	Lines
internal/dependencymanager/install.go	0.00%	40 Missing ⚠️
internal/dependencymanager/add.go	0.00%	2 Missing ⚠️
internal/dependencymanager/dependencyinstaller.go	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1841      +/-   ##
==========================================
- Coverage   28.47%   27.90%   -0.57%     
==========================================
  Files          95       95              
  Lines        6490     6482       -8     
==========================================
- Hits         1848     1809      -39     
- Misses       4462     4497      +35     
+ Partials      180      176       -4     

Flag	Coverage Δ
unittests	27.90% <8.51%> (-0.57%)	⬇️

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🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[jribbink]

LGTM