Adds rollup indexer component

[dbbaughe]

Issue #, if available:

Description of changes:
Tests will be included in PR with runner

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #340 (15643ea) into master (469a646) will decrease coverage by 0.84%.
The diff coverage is 4.83%.

@@             Coverage Diff              @@
##             master     #340      +/-   ##
============================================
- Coverage     72.80%   71.95%   -0.85%     
+ Complexity     1187     1186       -1     
============================================
  Files           181      181              
  Lines          6078     6140      +62     
  Branches        921      933      +12     
============================================
- Hits           4425     4418       -7     
- Misses         1188     1252      +64     
- Partials        465      470       +5     

Impacted Files	Coverage Δ	Complexity Δ
...csearch/indexmanagement/rollup/util/RollupUtils.kt	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...sticsearch/indexmanagement/rollup/RollupIndexer.kt	8.47% <5.26%> (-91.53%)	1.00 <0.00> (ø)
...anagement/indexstatemanagement/model/Transition.kt	63.07% <0.00%> (-4.62%)	5.00% <0.00%> (ø%)
...adata/TransportUpdateManagedIndexMetaDataAction.kt	85.18% <0.00%> (-3.71%)	9.00% <0.00%> (-1.00%)
...icsearch/indexmanagement/IndexManagementIndices.kt	62.06% <0.00%> (-3.45%)	10.00% <0.00%> (ø%)
...ch/indexmanagement/elasticapi/ElasticExtensions.kt	62.22% <0.00%> (-2.23%)	0.00% <0.00%> (ø%)
...agement/indexstatemanagement/ManagedIndexRunner.kt	55.04% <0.00%> (-0.62%)	41.00% <0.00%> (ø%)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 469a646...15643ea. Read the comment docs.