test: skip flaky tests

[hanxiao]

these two flaky tests slow us down. the reason of flaky remains unknown

[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1472, delta to last 3 avg.: -1%
• 😶 query QPS at 25, delta to last 3 avg.: -3%

Breakdown

Version	Index QPS	Query QPS
current	1472	25
0.9.1	1467	26
0.8.22	1494	25
0.8.21	1525	26

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

[codecov]

Codecov Report

Merging #1598 (a5a962c) into master (692c2d9) will increase coverage by 0.99%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1598      +/-   ##
==========================================
+ Coverage   83.92%   84.92%   +0.99%     
==========================================
  Files         128      128              
  Lines        6674     6731      +57     
==========================================
+ Hits         5601     5716     +115     
+ Misses       1073     1015      -58     

Impacted Files	Coverage Δ
jina/logging/profile.py	69.84% <0.00%> (-0.56%)	⬇️
jina/drivers/craft.py	100.00% <0.00%> (ø)
jina/types/ndarray/generic.py	100.00% <0.00%> (ø)
jina/drivers/encode.py	94.91% <0.00%> (+0.08%)	⬆️
jina/enums.py	96.59% <0.00%> (+0.09%)	⬆️
jina/jaml/__init__.py	95.93% <0.00%> (+0.09%)	⬆️
jina/clients/helper.py	94.00% <0.00%> (+0.12%)	⬆️
jina/executors/indexers/vector.py	93.15% <0.00%> (+0.14%)	⬆️
jina/peapods/runtimes/asyncio/rest/__init__.py	93.18% <0.00%> (+0.15%)	⬆️
jina/flow/builder.py	73.91% <0.00%> (+0.28%)	⬆️
... and 14 more

---

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 692c2d9...c320672. Read the comment docs.