Implement incremental daemon loading

[jonjohnsonjr]

WIP

Fixes #205

[codecov-io]

Codecov Report

Merging #559 into master will decrease coverage by 0.75%.
The diff coverage is 38%.

@@            Coverage Diff             @@
##           master     #559      +/-   ##
==========================================
- Coverage   72.57%   71.82%   -0.76%     
==========================================
  Files          94       95       +1     
  Lines        4241     4323      +82     
==========================================
+ Hits         3078     3105      +27     
- Misses        769      813      +44     
- Partials      394      405      +11

Impacted Files	Coverage Δ
pkg/v1/daemon/write.go	31.11% <26.08%> (-18.89%)	⬇️
pkg/v1/tarball/write.go	58.65% <50%> (-2.18%)	⬇️
pkg/v1/tarball/options.go	84.61% <84.61%> (ø)

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[jonjohnsonjr]

Running the POC:

$ time go run main.go 
Loaded image: example.com/ubuntu:latest========================================>]     163B/163B
Loaded image: example.com/ubuntu:latest-layer_0_probe
Loaded image: example.com/ubuntu:latest-layer_1_probe
Loaded image: example.com/ubuntu:latest-layer_2_probe
Loaded image: example.com/ubuntu:latest-layer_3_probe
Loaded image: example.com/ubuntu:latest

real	0m4.672s
user	0m1.673s
sys	0m0.529s


$ time go run main.go 
Loaded image: example.com/ubuntu:latest-layer_0_probe
Loaded image: example.com/ubuntu:latest-layer_1_probe
Loaded image: example.com/ubuntu:latest-layer_2_probe
Loaded image: example.com/ubuntu:latest-layer_3_probe
Loaded image: example.com/ubuntu:latest
Loaded image: example.com/ubuntu:latest-layer_0_probe
Loaded image: example.com/ubuntu:latest-layer_1_probe
Loaded image: example.com/ubuntu:latest-layer_2_probe
Loaded image: example.com/ubuntu:latest-layer_3_probe
Loaded image: example.com/ubuntu:latest

real	0m3.265s
user	0m1.467s
sys	0m0.401s

[github-actions]

This Pull Request is stale because it has been open for 90 days with
no activity. It will automatically close after 30 more days of
inactivity. Reopen with /reopen. Mark as fresh by adding the
comment /remove-lifecycle stale.