fix: replace docker id with uids

[jacobowitz]

the hack to retrieve the container id was too unreliable. I replaced it with some simple uid mechanism. No need to get the actual container id.

[codecov]

Codecov Report

Merging #4217 (a6ca2dc) into master (a58d866) will increase coverage by 0.22%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4217      +/-   ##
==========================================
+ Coverage   86.41%   86.64%   +0.22%     
==========================================
  Files         114      114              
  Lines        8272     8272              
==========================================
+ Hits         7148     7167      +19     
+ Misses       1124     1105      -19     

Flag	Coverage Δ
daemon	42.34% <ø> (ø)
jina	84.57% <ø> (-1.58%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
jina/jaml/parsers/__init__.py	85.71% <0.00%> (-7.15%)	⬇️
.../runtimes/request_handlers/data_request_handler.py	86.31% <0.00%> (-6.32%)	⬇️
jina/clients/__init__.py	84.84% <0.00%> (-6.07%)	⬇️
jina/orchestrate/flow/base.py	85.71% <0.00%> (-5.28%)	⬇️
jina/orchestrate/peas/__init__.py	86.25% <0.00%> (-3.75%)	⬇️
jina/jaml/helper.py	82.92% <0.00%> (-2.44%)	⬇️
jina/serve/runtimes/gateway/http/__init__.py	97.56% <0.00%> (-2.44%)	⬇️
jina/clients/base/http.py	94.11% <0.00%> (-1.97%)	⬇️
jina/jaml/parsers/flow/v1.py	96.49% <0.00%> (-1.76%)	⬇️
jina/orchestrate/peas/jinad.py	90.62% <0.00%> (-1.57%)	⬇️
... and 8 more

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[github-actions]

Latency summary

Current PR yields:

• 🐢🐢 index QPS at 987, delta to last 2 avg.: -29%
• 🐎🐎🐎🐎 query QPS at 50, delta to last 2 avg.: +80%
• 🐎🐎🐎🐎 avg flow time within 1.6938 seconds, delta to last 2 avg.: +40%
• 🐢🐢 import jina within 0.3439 seconds, delta to last 2 avg.: -13%

Breakdown

Version	Index QPS	Query QPS	Avg Flow Time (s)	Import Time (s)
current	987	50	1.6938	0.3439
2.6.4	1317	26	1.0872	0.424
2.6.3	1474	28	1.3266	0.3677

Backed by latency-tracking. Further commits will update this comment.