feat(bigtable): per-operation Options (pt. 2)

[dbolduc]

Fixes #7688

Accept Options in the (Async)ReadModifyWriteRow(..., Args&& rules_and_options) parameter packs. (I dare you to improve on the name: rules_and_options).

We extract the options using GroupOptions(...). And ignore Options when we are adding rules to the request proto.

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This change is 

[google-cloud-cpp-bot]

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For commit: e518a1479c5371d4f5f2ff12589167281b9b023a

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[codecov]

Codecov Report

Merging #9627 (e518a14) into main (fe748ba) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #9627   +/-   ##
=======================================
  Coverage   94.36%   94.37%           
=======================================
  Files        1488     1488           
  Lines      138043   138105   +62     
=======================================
+ Hits       130270   130330   +60     
- Misses       7773     7775    +2     

Impacted Files	Coverage Δ
google/cloud/bigtable/legacy_table_test.cc	100.00% <100.00%> (ø)
google/cloud/bigtable/table.cc	99.42% <100.00%> (+<0.01%)	⬆️
google/cloud/bigtable/table.h	98.55% <100.00%> (+0.05%)	⬆️
google/cloud/bigtable/table_test.cc	100.00% <100.00%> (ø)
...e/cloud/pubsublite/internal/alarm_registry_impl.cc	97.05% <0.00%> (-2.95%)	⬇️
...cloud/pubsub/internal/subscription_session_test.cc	98.15% <0.00%> (-0.84%)	⬇️
google/cloud/pubsub/samples/samples.cc	90.70% <0.00%> (-0.08%)	⬇️
google/cloud/storage/parallel_upload.cc	98.61% <0.00%> (+0.34%)	⬆️
google/cloud/bigtable/read_modify_write_rule.h	90.47% <0.00%> (+0.47%)	⬆️
...e/cloud/spanner/testing/cleanup_stale_instances.cc	72.22% <0.00%> (+11.11%)	⬆️

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