🐛 fix catalogd panic, paste error on mac

[grokspawn]

Description

This PR fixes two issues, from least- to most-important:

1. differing syntax for paste tool in linux, mac contexts. paste on BSD requires an explicit indication of STDIN, whereas linux assumes STDIN if no file is specified. POSIX behavior is to specify - if STDIN is indicated, which works for both platforms.
2. make run and variants use the "linux" build targets, which claim in docs to use native GOARCH but actually hardcode it to amd64. On Apple silicon the cross-compile now results in panics running these cross-compiled binaries using Rosetta (and Apple has stated it is sunsetting support for amd64 binaries on arm64 hardware, so it needs resolving anyway). The GOARCH hardcoding was introduced during the change to helm templating (from kustomize) but appears to have been unnecessary.

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[Copilot]

Pull request overview

This PR addresses cross-platform developer workflow issues in operator-controller’s Make-based build/test tooling, improving macOS compatibility and preventing architecture-mismatch binaries from being produced for make run/docker-build flows.

Changes:

• Make COVERAGE_PKGS generation portable by explicitly specifying stdin (paste ... -) so BSD paste works on macOS.
• Stop hardcoding GOARCH=amd64 for go-build-linux, allowing GOOS=linux builds to use the host architecture (fixes Apple silicon workflows and avoids running amd64 binaries via Rosetta).

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[perdasilva]

/approve

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.42%. Comparing base (7d6a00d) to head (d432c81).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #2779 +/- ##
=======================================
Coverage 70.42% 70.42% =======================================
Files 143 143 Lines 10617 10617 =======================================
Hits 7477 7477 Misses 2579 2579 Partials 561 561 

Flag	Coverage Δ
e2e	35.16% <ø> (+0.04%)	⬆️
experimental-e2e	52.45% <ø> (+0.07%)	⬆️
unit	59.48% <ø> (-0.01%)	⬇️

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[pedjak]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: perdasilva, rashmigottipati

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