[7.11] go.mod: use upstream badger (#4631)

[axw]

Backports the following commits to 7.11:

• go.mod: use upstream badger (go.mod: use upstream badger #4631)

[codecov-io]

Codecov Report

Merging #4633 (f8bb246) into 7.11 (478ab50) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             7.11    #4633      +/-   ##
==========================================
+ Coverage   75.90%   75.93%   +0.03%     
==========================================
  Files         161      161              
  Lines        9789     9789              
==========================================
+ Hits         7430     7433       +3     
+ Misses       2359     2356       -3     

Impacted Files	Coverage Δ
publish/acker.go	78.94% <0.00%> (-10.53%)	⬇️
...ack/apm-server/aggregation/txmetrics/aggregator.go	93.36% <0.00%> (ø)
kibana/connecting_client.go	70.17% <0.00%> (+8.77%)	⬆️

[apmmachine]

💚 Build Succeeded

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Build stats

• Build Cause: Pull request #4633 opened

• • Start Time: 2021-01-19T00:25:14.981+0000

• Duration: 43 min 52 sec

• Commit: f8bb246

Test stats 🧪

Test	Results
Failed	0
Passed	4510
Skipped	126
Total	4636

Steps errors

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Compress

• Took 0 min 0 sec . View more details on here
• Description: tar --exclude=coverage-files.tgz -czf coverage-files.tgz coverage

Compress

• Took 0 min 0 sec . View more details on here
• Description: tar --exclude=system-tests-linux-files.tgz -czf system-tests-linux-files.tgz system-tests