feat: increase concurrency in controllers, make sqlite datastore default

[waveywaves]

• update concurrent reconciliations for the helm controller from 5 to 20
• cleanup some of the main.go
• update date concurrent reconciliations for the uffizzicluster controller from 1 to 5
• sqlite as the default externalDatastore

Note the worker count in the uffizzicluster controller before and after. The default number of workers has been set to 5.

Updated uffizzi cluster worker count

2023-11-22T11:19:53Z    DEBUG   events  pr-79-uffizzi-cluster-operator-5fcc7bd77b-52zt8_e5592983-09ee-42e1-9731-a87930fbb1cb became leader    {"type": "Normal", "object": {"kind":"Lease","namespace":"default","name":"bfbf93f2.uffizzi.com","uid":"1d6999de-703d-435a-9f87-39220da52312","apiVersion":"coordination.k8s.io/v1","resourceVersion":"1230"}, "reason": "LeaderElection"}
2023-11-22T11:19:53Z    INFO    Starting workers        {"controller": "uffizzicluster", "controllerGroup": "uffizzi.com", "controllerKind": "UffizziCluster", "worker count": 5}
2023-11-22T11:19:53Z    INFO    Starting workers        {"controller": "uffizzicluster", "controllerGroup": "uffizzi.com", "controllerKind": "UffizziCluster", "worker count": 5}

Updated helm controller worker count

{"level":"info","ts":"2023-11-22T11:09:26.904Z","msg":"Starting Controller","controller":"helmrelease","controllerGroup":"helm.toolkit.fluxcd.io","controllerKind":"HelmRelease"}
{"level":"info","ts":"2023-11-22T11:09:27.008Z","msg":"Starting workers","controller":"helmrelease","controllerGroup":"helm.toolkit.fluxcd.io","controllerKind":"HelmRelease","worker count":20}

fixes #77 #78

[github-actions]

Uffizzi Cluster pr-79 was deleted.

[codecov]

Codecov Report

Merging #79 (575c06f) into main (c2da179) will decrease coverage by 14.54%.
Report is 130 commits behind head on main.
The diff coverage is 5.05%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #79       +/-   ##
==========================================
- Coverage   19.58%   5.05%   -14.54%     
==========================================
  Files           4       8        +4     
  Lines         388    1069      +681     
==========================================
- Hits           76      54       -22     
- Misses        308    1015      +707     
+ Partials        4       0        -4     

Files	Coverage Δ
controllers/uffizzicluster/workload.go	0.00% <0.00%> (ø)
controllers/uffizzicluster/deployment.go	0.00% <0.00%> (ø)
controllers/uffizzicluster/statefulset.go	0.00% <0.00%> (ø)
controllers/uffizzicluster/networkpolicy.go	0.00% <0.00%> (ø)
controllers/uffizzicluster/conditions.go	40.33% <40.33%> (ø)
controllers/uffizzicluster/helm.go	0.00% <0.00%> (ø)
...ollers/uffizzicluster/uffizzicluster_controller.go	0.00% <0.00%> (ø)
controllers/helm/build/vcluster/build.go	1.84% <1.84%> (ø)