treewide: run gofmt -s and enable linter

Change-Id: I90b8ef48c955dccfddc5bbc0a57205b7da844b60
Reviewed-on: https://review.monogon.dev/c/monogon/+/3828
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/build/analysis/BUILD.bazel b/build/analysis/BUILD.bazel
index b97a58e..f55a2ad 100644
--- a/build/analysis/BUILD.bazel
+++ b/build/analysis/BUILD.bazel
@@ -91,7 +91,7 @@
     "//build/analysis/checkcompilerdirectives",
     "//build/analysis/noioutil",
     "//build/analysis/importsort",
-    #    "//build/analysis/gofmt",  # TODO(tim): Enable when formatted
+    "//build/analysis/gofmt",
 ]
 
 # NOGO_CONFIG_OVERRIDES contains the overrides for nogo to exempt specific files
@@ -213,6 +213,7 @@
     "returnerrcheck",
     "hash",
     "errcmp",
+    "gofmt",
 ] + ALL_STATICCHECK_ANALYZERS
 
 # We override the variable with itself unioned with the other