Switch go todos from issue # syntax to links

[damccorm]

In #21830 I updated all our Go TODOs to reference issues as TODO(Issue #), but in #21831 Brian convinced me that links are better. This updates to use links.

Part of #21812

---

Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily:

• Choose reviewer(s) and mention them in a comment (R: @username).
• Mention the appropriate issue in your description (for example: addresses #123), if applicable. This will automatically add a link to the pull request in the issue. If you would like the issue to automatically close on merging the pull request, comment fixes #<ISSUE NUMBER> instead.
• Update CHANGES.md with noteworthy changes.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

See the Contributor Guide for more tips on how to make review process smoother.

To check the build health, please visit https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI.

[asf-ci]

Can one of the admins verify this patch?

[asf-ci]

Can one of the admins verify this patch?

[asf-ci]

Can one of the admins verify this patch?

[damccorm]

R: @riteshghorse and @lostluck - tagging you directly for continuity (should be an easy one)

[github-actions]

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

[codecov]

Codecov Report

Merging #21890 (60ad46e) into master (9a74f17) will not change coverage.
The diff coverage is 70.58%.

@@           Coverage Diff           @@
##           master   #21890   +/-   ##
=======================================
  Coverage   74.01%   74.01%           
=======================================
  Files         699      699           
  Lines       92675    92675           
=======================================
  Hits        68592    68592           
  Misses      22828    22828           
  Partials     1255     1255           

Flag	Coverage Δ
go	50.82% <70.58%> (ø)

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

Impacted Files	Coverage Δ
sdks/go/pkg/beam/artifact/materialize.go	43.50% <ø> (ø)
sdks/go/pkg/beam/core/graph/coder/coder.go	85.98% <ø> (ø)
sdks/go/pkg/beam/core/graph/mtime/time.go	68.42% <ø> (ø)
sdks/go/pkg/beam/core/runtime/exec/cogbk.go	0.00% <ø> (ø)
sdks/go/pkg/beam/core/runtime/exec/combine.go	60.43% <ø> (ø)
sdks/go/pkg/beam/core/runtime/exec/translate.go	14.28% <0.00%> (ø)
sdks/go/pkg/beam/core/runtime/graphx/cogbk.go	72.72% <ø> (ø)
...dks/go/pkg/beam/core/runtime/harness/monitoring.go	23.12% <ø> (ø)
sdks/go/pkg/beam/core/util/jsonx/jsonx.go	78.57% <ø> (ø)
sdks/go/pkg/beam/io/textio/textio.go	55.15% <ø> (ø)
... and 10 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9a74f17...60ad46e. Read the comment docs.

[riteshghorse]

LGTM! It's the same license one that's failing

[lostluck]

Works for me.