passing version configuration as part of the build to fix cli version command

[enekofb]

Closes #3343

What changed?

• Passing Ldflags for gitops cli so variable are updated with the right values instead of default.
• Removed the bits around getting configuration from weave gitops as it seems that was only used here (and we dont require it)

Why was this change made?

• Address bug

How was this change implemented?

• Using the same approach used for other Ldflags within the Makefile

How did you validate the change?

• Explain how a reviewer can verify the change themselves

checkout the branch and repeat the following steps

➜  weave-gitops-enterprise git:(issues/3343) ✗ make cmd/gitops/gitops                                                                                                                                                    
CGO_ENABLED=0 go build -ldflags "-X github.com/weaveworks/weave-gitops/cmd/gitops/version.Branch=main -X github.com/weaveworks/weave-gitops/cmd/gitops/version.BuildTime=2023-09-12_16:36:21 -X github.com/weaveworks/weave-gitops/cmd/gitops/version.GitCommit=a8dee904b28d7087f8212f45e69654a9f7734136 -X github.com/weaveworks/weave-gitops/cmd/gitops/version.Version=v0.31.0-27-ga8dee90" -gcflags='all=-N -l' -o cmd/gitops/gitops  ./cmd/gitops

➜  weave-gitops-enterprise git:(issues/3343) ✗ cmd/gitops/gitops version                                                                                                                                                 Current Version: v0.31.0-27-ga8dee90
GitCommit: a8dee904b28d7087f8212f45e69654a9f7734136
BuildTime: 2023-09-12_16:36:21
Branch: main

• Integration tests -- what is covered, what cannot be covered;
  or, explain why there are no new tests
• Unit tests -- what is covered, what cannot be covered; are
  there tests that fail without the change?

Added test case to ensure we have some regression within the code

Release notes
No

Documentation Changes
No

Other follow ups
Not that i could think of

[opudrovs]

And you even added tests for this, neat! ✨