remove the enable.docker.tests gradle property since TestContainers handles it now

[jkwatson]

No description provided.

[codecov]

Codecov Report

Merging #2028 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2028      +/-   ##
============================================
- Coverage     84.37%   84.36%   -0.02%     
- Complexity     1879     1880       +1     
============================================
  Files           223      223              
  Lines          7585     7585              
  Branches        808      808              
============================================
- Hits           6400     6399       -1     
- Misses          874      876       +2     
+ Partials        311      310       -1     

Impacted Files	Coverage Δ	Complexity Δ
...lemetry/context/PersistentHashArrayMappedTrie.java	45.45% <0.00%> (-3.64%)	4.00% <0.00%> (ø%)
...emetry/api/trace/propagation/HttpTraceContext.java	97.24% <0.00%> (+0.91%)	33.00% <0.00%> (+1.00%)
...try/sdk/metrics/aggregator/LongMinMaxSumCount.java	100.00% <0.00%> (+4.08%)	6.00% <0.00%> (ø%)

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