feat(serverv2): integrate gRPC (backport #21038)

[mergify]

Description

This PR Integrates gRPC in serverv2 leveraging grpc.UnknownServiceHandler to provide mapping between grpc methods and an appmanager query call.

closes: #20798

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Summary by CodeRabbit

• New Features

  • Enhanced gRPC method handling with a new mapping method for simplified message generation.
  • Improved logging and service management for the server reflection functionality.
  • Introduction of new constants for managing gRPC metadata.

• Bug Fixes

  • Streamlined handling of unknown gRPC services and improved error handling.

• Refactor

  • Renamed and updated methods and structures for clarity and consistency.
  • Simplified the decoding process by eliminating the need for input parameters in gRPC method functions.

• Chores

  • Updated dependency management for better control and clarity on required packages.

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This is an automatic backport of pull request #21038 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 8b47141 has failed:

On branch mergify/bp/release/v0.52.x/pr-21038
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit 8b4714165.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   runtime/v2/app.go
	modified:   runtime/v2/manager.go
	modified:   runtime/v2/module.go
	modified:   server/v2/api/grpc/gogoreflection/serverreflection.go
	modified:   server/v2/api/grpc/server.go
	modified:   server/v2/cometbft/abci.go
	modified:   server/v2/server_test.go
	modified:   server/v2/types.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   schema/appdata/mux_test.go
	both modified:   server/v2/cometbft/server.go
	both modified:   server/v2/go.mod

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[github-actions]

@mergify[bot] your pull request is missing a changelog!

[julienrbrt]

utACK. Things will be synced properly after #21093