Move abs template logic to hypervisor

[AriaXLi]

This commit moves abs template logic to the hypervisor just like what 2b97ea7 did but for abs instead of vmpooler.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01% ⚠️

Comparison is base (b41b7af) 0.74% compared to head (6daaf4d) 0.73%.

❗ Current head 6daaf4d differs from pull request most recent head 7b5e572. Consider uploading reports for the commit 7b5e572 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #317      +/-   ##
=========================================
- Coverage    0.74%   0.73%   -0.01%     
=========================================
  Files          15      15              
  Lines        1756    1757       +1     
=========================================
  Hits           13      13              
- Misses       1743    1744       +1     

Files Changed	Coverage Δ
lib/beaker-hostgenerator/hypervisor/abs.rb	0.00% <0.00%> (ø)

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