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

[axw]

Backports the following commits to 7.x:

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

[codecov-io]

Codecov Report

Merging #4632 (8fb089d) into 7.x (859dfc2) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              7.x    #4632      +/-   ##
==========================================
- Coverage   75.97%   75.92%   -0.06%     
==========================================
  Files         161      161              
  Lines        9789     9789              
==========================================
- Hits         7437     7432       -5     
- Misses       2352     2357       +5     

Impacted Files	Coverage Δ
publish/acker.go	78.94% <0.00%> (-10.53%)	⬇️
kibana/connecting_client.go	61.40% <0.00%> (-8.78%)	⬇️
processor/otel/consumer.go	93.95% <0.00%> (+0.44%)	⬆️

[apmmachine]

💚 Build Succeeded

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Build stats

• Build Cause: Pull request #4632 opened

• • Start Time: 2021-01-19T00:21:01.209+0000

• Duration: 40 min 23 sec

• Commit: 8fb089d

Test stats 🧪

Test	Results
Failed	0
Passed	4513
Skipped	126
Total	4639

Steps errors

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Run Window tests

• Took 9 min 45 sec . View more details on here

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