[BEAM-14511] Growable Tracker for Go SDK

[riteshghorse]

Added a growable tracker for Go SDK. This is useful in streaming use cases of SDFs.

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[riteshghorse]

Run GoPortable PostCommit

[codecov]

Codecov Report

Merging #17754 (3f8e8da) into master (23aeca4) will increase coverage by 0.00%.
The diff coverage is 76.27%.

@@           Coverage Diff           @@
##           master   #17754   +/-   ##
=======================================
  Coverage   74.07%   74.07%           
=======================================
  Files         697      697           
  Lines       91927    91980   +53     
=======================================
+ Hits        68091    68136   +45     
- Misses      22591    22595    +4     
- Partials     1245     1249    +4     

Flag	Coverage Δ
go	50.82% <76.27%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...o/pkg/beam/io/rtrackers/offsetrange/offsetrange.go	80.62% <76.27%> (+2.12%)	⬆️

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[riteshghorse]

R: @damccorm @jrmccluskey

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Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[riteshghorse]

CC: @youngoli

[riteshghorse]

R: @lostluck

[lostluck]

The tests are good, but we can make them better.

[riteshghorse]

Made the changes, PTAL.

[lostluck]

It looks like GetProgress isn't implemented correctly. If there's a good reason for it, add a comment, otherwise, we should be closer to the java implementation. As it stands, there will be effectively no progress until the range becomes bounded.

[lostluck]

LGTM