Bump version to 7.10.2

[simitt]

• Update to beats 7.10 branch
• Update APM Server version to 7.10.2
• Update approval tests

[codecov-io]

Codecov Report

Merging #4500 (7f1759b) into 7.10 (f350171) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             7.10    #4500      +/-   ##
==========================================
- Coverage   80.21%   80.18%   -0.04%     
==========================================
  Files         158      158              
  Lines        8660     8660              
==========================================
- Hits         6947     6944       -3     
- Misses       1713     1716       +3     

Impacted Files	Coverage Δ
kibana/connecting_client.go	61.40% <0.00%> (-8.78%)	⬇️
publish/acker.go	89.47% <0.00%> (+10.52%)	⬆️

[apmmachine]

💚 Build Succeeded

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Build stats

• Build Cause: Pull request #4500 opened

• Start Time: 2020-12-09T11:07:12.501+0000

• Duration: 27 min 51 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4053
Skipped	142
Total	4195

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