make: Enhance/fix go version linting

[dstadulis]

A portability bug in BSD vs GNU sed is remediated in this PR as well as tightening up when Go version validation fails.

• make: simplify calling Go version consistency checks
• make: add comments to describe purpose of the linter-supporting scripts
• make: replace non-portable use of sed with tr
• make: replace error condition's predicate Instead of returning an error if any go version exists other than the stipulated version, require the extracted Go version to be the stipulated version
• make: error reporting logic - Add error reporting logic Error if false-negative version validation exist: e.g. find command fails to induce check_go_version - Add validation-failure reporting - Capture output of check_go_version for validation processing
• make: Modify phrasing of error report to communicate violated version and stipulated version Remove exit status to be replaced with FAIL error-message presence

Tests

Tests to validate true positive and true negative

echo "Validate help print"
./tools/check-go-version-dockerfile.sh
./tools/check-go-version-yaml.sh
echo "Validate pass condition"
./tools/check-go-version-dockerfile.sh 1.21.4
./tools/check-go-version-yaml.sh 1.21.4
echo "Validate failure condition"
./tools/check-go-version-dockerfile.sh 96
./tools/check-go-version-yaml.sh 96

[ffranr]

As far as I'm aware, this PR isn't ready for me to review. So I'm going to remove my review request to keep my review request list short. Please re-request when ready.

[lightninglabs-deploy]

@jharveyb: review reminder