PMM-7 Modernize go tools

[ademidoff]

PMM-7

Link to the Feature Build: SUBMODULES-0

This pull request migrates the project’s tool management approach from custom installation scripts and local binaries to using Go’s built-in tool management (go tool <toolname>). This change simplifies development workflows and CI/CD, removes redundant files, and updates dependencies. The most important changes are grouped below.

Tool Management Modernization:

• All Makefiles (Makefile.include, api/Makefile, agent/Makefile, api-tests/Makefile) and CI workflows (.github/workflows/main.yml) now use go tool <toolname> instead of referencing binaries in the bin/ directory for tools like buf, swagger, golangci-lint, mockery, go-junit-report, benchstat, license-eye, go-sumtype, and go-consistent. This eliminates the need for custom installation and generation steps for these tools. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17]

• The make init targets and corresponding scripts are updated to reflect that tools are managed via Go modules, and legacy installation/generation logic is removed. [1] [2] [3] [4] [5]

Simplification and Cleanup:

• The api-tests/tools/go.mod and api-tests/tools/tools.go files are deleted, as tool dependencies are now managed centrally in the root go.mod. [1] [2]

• Redundant commands and bin/ directory references are removed from scripts and Makefiles. [1] [2] [3]

Dependency Updates:

• The project is updated to Go 1.25, and several dependencies are bumped to their latest versions in go.mod (e.g., github.com/pkg/sftp, github.com/prometheus/prometheus, golang.org/x/crypto, golang.org/x/text, google.golang.org/genproto). [1] [2]

Dev Environment Improvements:

• The .devcontainer/setup.py script is simplified: package installation is consolidated, unnecessary packages are removed, and repo enablement is streamlined.

CI Workflow Streamlining:

• CI steps for tool installation, formatting, linting, and license checks are updated to use Go toolchain directly, reducing complexity and potential for drift between environments. [1] [2] [3] [4] [5] [6]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.55%. Comparing base (9bb06be) to head (9d26fd0).

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #4606      +/-   ##
==========================================
+ Coverage   44.51%   44.55%   +0.03%     
==========================================
  Files         363      363              
  Lines       45715    45715              
==========================================
+ Hits        20351    20367      +16     
+ Misses      23706    23691      -15     
+ Partials     1658     1657       -1     

Flag	Coverage Δ
admin	17.33% <ø> (ø)
agent	53.35% <ø> (+0.12%)	⬆️
managed	44.49% <ø> (+<0.01%)	⬆️
vmproxy	74.13% <ø> (ø)

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