client: supports to add gRPC dial options (#2035) (#2043)

[sre-bot]

cherry-pick #2043 to release-3.1

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Signed-off-by: nolouch [email protected]

What problem does this PR solve?

cherry-pick #2035

What is changed and how it works?

add an option.

Check List

Tests

• Unit test

[codecov-io]

Codecov Report

Merging #2046 into release-3.1 will decrease coverage by 0.18%.
The diff coverage is 92.85%.

@@               Coverage Diff               @@
##           release-3.1    #2046      +/-   ##
===============================================
- Coverage        69.66%   69.47%   -0.19%     
===============================================
  Files              171      171              
  Lines            16837    16846       +9     
===============================================
- Hits             11729    11704      -25     
- Misses            4136     4159      +23     
- Partials           972      983      +11

Impacted Files	Coverage Δ
client/client.go	74.53% <92.85%> (+0.48%)	⬆️
pkg/tempurl/tempurl.go	57.14% <0%> (-14.29%)	⬇️
pkg/etcdutil/etcdutil.go	86.04% <0%> (-9.31%)	⬇️
server/util.go	68.15% <0%> (-7.01%)	⬇️
server/schedulers/shuffle_hot_region.go	58.97% <0%> (-6.42%)	⬇️
server/namespace_cluster.go	81.81% <0%> (-3.9%)	⬇️
server/leader.go	79.59% <0%> (-2.45%)	⬇️
server/tso.go	74.35% <0%> (-1.71%)	⬇️
server/grpc_service.go	59.91% <0%> (-0.64%)	⬇️
server/cluster.go	81.31% <0%> (-0.51%)	⬇️
... and 4 more

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[lhy1024]

/run-all-tests

[nolouch]

/merge

[sre-bot]

/run-all-tests