feat: grpc-web add CORS handler

[aleem1314]

Description

Closes: #9467

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Author Checklist

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• included the correct type prefix in the PR title
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• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #9493 (ce8691f) into master (3c82a32) will decrease coverage by 0.00%.
The diff coverage is 20.00%.

❗ Current head ce8691f differs from pull request most recent head 78be226. Consider uploading reports for the commit 78be226 to get more accurate results

@@            Coverage Diff             @@
##           master    #9493      +/-   ##
==========================================
- Coverage   60.59%   60.58%   -0.01%     
==========================================
  Files         589      589              
  Lines       37211    37218       +7     
==========================================
+ Hits        22547    22548       +1     
- Misses      12721    12726       +5     
- Partials     1943     1944       +1     

Impacted Files	Coverage Δ
server/config/config.go	41.44% <0.00%> (-0.38%)	⬇️
server/config/toml.go	18.18% <ø> (ø)
server/grpc/grpc_web.go	46.66% <28.57%> (-20.00%)	⬇️

[cyberbono3]

lgtm

[amaury1093]

@aleem1314 did you get a chance to test this manually? I'm okay to merge this if it's tested (or else we need to add another item in regen-network/regen-ledger#352)

[aleem1314]

@aleem1314 did you get a chance to test this manually? I'm okay to merge this if it's tested (or else we need to add another item in regen-network/regen-ledger#352)

Yes. I've tested manually. Here is a client if anyone wants to test.

[amaury1093]

Nice, thanks a lot @aleem1314! Could you add a changelog entry? Feel free to put automerge right after