chore: update to go1.24

[rbtr]

notably, this kills hack/tools in favor of the new tools directive in the go.mod.
Go 1.24 now has FIPS certification of the 1P crypto, but we are currently still required to use MSFT Go...

[Copilot]

PR Overview

This PR updates the Go version configuration across multiple CI workflows to align with the upgrade to Go 1.24, while also removing an obsolete tools registration file and updating some dependency configurations.

• Update go-version settings from fixed version ranges (e.g. "^1.23") to non-deterministic strings ("latest" or "stable").
• Remove the build/tools/tools.go file, which previously imported various tool dependencies.
• Adjust the invocation of go-junit-report in unit test pipelines.

Reviewed Changes

File	Description
.github/workflows/cyclonus-netpol-extended-nightly-test.yaml	Updated go-version from "^1.23" to "latest" for Go version configuration.
.github/workflows/cyclonus-netpol-test.yaml	Updated go-version from '^1.23' to "latest".
.github/workflows/golangci.yaml	Switched go-version to "stable" and updated golangci-lint version to "latest".
.github/workflows/codeql.yaml	Updated go-version from "1.23" to "latest".
.github/dependabot.yaml	Removed a dependency block for "/build/tools".
.github/workflows/crdgen.yaml	Removed matrix configuration and set a fixed runner and go-version to "stable".
.pipelines/templates/unit-tests.stages.yaml	Changed go-junit-report invocation to use "go tool go-junit-report".
.pipelines/templates/run-unit-tests.yaml	Changed go-junit-report invocation to use "go tool go-junit-report".
build/tools/tools.go	Deleted file registering tool dependencies.

Copilot reviewed 48 out of 48 changed files in this pull request and generated 3 comments.

Comments suppressed due to low confidence (1)

build/tools/tools.go:1

• Removal of the tools.go file may affect dependencies on tool registration; please verify that no parts of the build or tooling process rely on these imports.

package tools