YETUS-916. upgrade golangci-lint and prototool; rm go cache

[aw-was-here]

No description provided.

[busbey]

this looks reasonable on the surface, but I don't have stuff on hand to test it. so weak 👍 ?

[apache-yetus]

(!) A patch to the testing environment has been detected.
Re-executing against the patched versions to perform further tests.
The console is at https://builds.apache.org/job/yetus-github-multibranch/job/PR-74/1/console in case of problems.

[aw-was-here]

this looks reasonable on the surface, but I don't have stuff on hand to test it. so weak 👍 ?

In full disclosure, using that commit sha to build prototool from has some negatives to it and we'll almost certainly have to change it again soon. That said, most of those issues are related to how Go as a language community works (or, IMO, doesn't work).

In reality, I suspect most people are doing what I'm doing: creating a Dockerfile that FROM's apache/yetus:x.x.x and then replaces the Go bits with whatever actually works at that point in time.

[apache-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	33m 50s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
-0 ⚠️	test4tests	0m 0s	The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
		_ master Compile Tests _
+1 💚	mvninstall	1m 32s	master passed
+1 💚	javadoc	0m 12s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	0m 9s	the patch passed
+1 💚	hadolint	0m 3s	There were no new hadolint issues.
+1 💚	shellcheck	0m 1s	There were no new shellcheck issues.
+1 💚	shelldocs	0m 1s	There were no new shelldocs issues.
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	javadoc	0m 7s	the patch passed
		_ Other Tests _
+1 💚	unit	0m 8s	precommit in the patch passed.
+1 💚	asflicense	0m 8s	The patch does not generate ASF License warnings.
		36m 35s

Subsystem	Report/Notes
Docker	Client=19.03.2 Server=19.03.2 base: https://builds.apache.org/job/yetus-github-multibranch/job/PR-74/1/artifact/out/Dockerfile
GITHUB PR	#74
Optional Tests	dupname asflicense javac javadoc unit hadolint shellcheck shelldocs
uname	Linux cb1835ea9356 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22 16:55:30 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	precommit/src/main/shell/personality/yetus.sh
git revision	master / 6b07c67
Default Java	1.8.0_222
Test Results	https://builds.apache.org/job/yetus-github-multibranch/job/PR-74/1/testReport/
Max. process+thread count	99 (vs. ulimit of 2000)
modules	C: precommit U: precommit
Console output	https://builds.apache.org/job/yetus-github-multibranch/job/PR-74/1/console
versions	git=2.7.4 maven=3.3.9 shellcheck=0.7.0 hadolint=1.16.2-0-g3b6f5a6
Powered by	Apache Yetus 0.12.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.

[aw-was-here]

Thanks for the review. I'm going to merge this now so that things aren't broken. :)