deps: use google-cloud-shared-dependencies in bigtable deps bom

[kolea2]

No description provided.

[codecov]

Codecov Report

Merging #324 into master will decrease coverage by 0.35%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #324      +/-   ##
============================================
- Coverage     80.72%   80.36%   -0.36%     
+ Complexity     1050     1049       -1     
============================================
  Files            99       99              
  Lines          6541     6541              
  Branches        344      343       -1     
============================================
- Hits           5280     5257      -23     
+ Misses         1081     1080       -1     
- Partials        180      204      +24     

Impacted Files	Coverage Δ	Complexity Δ
...igtable/admin/v2/BaseBigtableTableAdminClient.java	58.18% <0.00%> (-4.73%)	67.00% <0.00%> (ø%)
...able/admin/v2/BaseBigtableInstanceAdminClient.java	57.07% <0.00%> (-4.40%)	56.00% <0.00%> (ø%)
...able/gaxx/reframing/ReframingResponseObserver.java	89.28% <0.00%> (-1.79%)	29.00% <0.00%> (-1.00%)
...om/google/cloud/bigtable/emulator/v2/Emulator.java	59.13% <0.00%> (+0.86%)	14.00% <0.00%> (ø%)

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[igorbernstein2]

lgtm