feat: change the way parameters are returned from Executors

[samsja]

follow up on this PR which is somehow broken on the github side

[github-actions]

Latency summary

Current PR yields:

• 🐢🐢 index QPS at 1205, delta to last 2 avg.: -20%
• 🐎🐎🐎🐎 query QPS at 53, delta to last 2 avg.: +79%
• 😶 avg flow time within 1.2268 seconds, delta to last 2 avg.: +3%
• 😶 import jina within 0.3501 seconds, delta to last 2 avg.: -2%

Breakdown

Version	Index QPS	Query QPS	Avg Flow Time (s)	Import Time (s)
current	1205	53	1.2268	0.3501
2.6.4	1489	29	1.3256	0.3678
2.6.3	1551	29	1.04	0.3532

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

[samsja]

the test named test_flow_change_parameters has been deleted because we don't allow anymore to change the parameters within the executors context

[codecov]

Codecov Report

Merging #4243 (ff9c574) into master (d1a0833) will increase coverage by 0.06%.
The diff coverage is 92.30%.

@@            Coverage Diff             @@
##           master    #4243      +/-   ##
==========================================
+ Coverage   87.16%   87.23%   +0.06%     
==========================================
  Files         113      113              
  Lines        8254     8286      +32     
==========================================
+ Hits         7195     7228      +33     
+ Misses       1059     1058       -1     

Flag	Coverage Δ
daemon	42.11% <23.07%> (-0.08%)	⬇️
jina	86.97% <92.30%> (+1.94%)	⬆️

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

Impacted Files	Coverage Δ
jina/clients/mixin.py	87.03% <75.00%> (-3.44%)	⬇️
.../runtimes/request_handlers/data_request_handler.py	93.91% <100.00%> (+7.59%)	⬆️
jina/serve/networking.py	71.27% <0.00%> (-12.47%)	⬇️
jina/orchestrate/deployments/__init__.py	80.80% <0.00%> (-2.11%)	⬇️
jina/jaml/__init__.py	95.43% <0.00%> (+0.38%)	⬆️
jina/orchestrate/pods/jinad.py	94.57% <0.00%> (+0.77%)	⬆️
jina/helper.py	81.87% <0.00%> (+0.83%)	⬆️
jina/serve/runtimes/gateway/http/app.py	90.80% <0.00%> (+1.14%)	⬆️
jina/jaml/parsers/flow/v1.py	98.24% <0.00%> (+1.75%)	⬆️
jina/clients/base/http.py	96.22% <0.00%> (+1.88%)	⬆️
... and 6 more

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