Replace lint-go-gopls with additional govet linters (#36028)

Many (but not all) analyzers ran by `gopls check` are available in
`golangci-lint` as part of default-disabled `govet` linters, so I think
it's best we remove this manual linting step and let `golangci-lint`
handle it. I hand-picked two available linters that were previously
linted using gopls and this list is not exhaustive.

This will reduce CI time by about 3 minutes.

tools/lint-go-gopls.sh

@@ -1,23 +0,0 @@
-#!/bin/bash
-set -uo pipefail
-
-cd "$(dirname -- "${BASH_SOURCE[0]}")" && cd ..
-
-IGNORE_PATTERNS=(
-  "is deprecated" # TODO: fix these
-)
-
-# lint all go files with 'gopls check' and look for lines starting with the
-# current absolute path, indicating a error was found. This is necessary
-# because the tool does not set non-zero exit code when errors are found.
-# ref: https://github.com/golang/go/issues/67078
-ERROR_LINES=$("$GO" run "$GOPLS_PACKAGE" check -severity=warning "$@" 2>/dev/null | grep -E "^$PWD" | grep -vFf <(printf '%s\n' "${IGNORE_PATTERNS[@]}"));
-NUM_ERRORS=$(echo -n "$ERROR_LINES" | wc -l)
-
-if [ "$NUM_ERRORS" -eq "0" ]; then
-  exit 0;
-else
-  echo "$ERROR_LINES"
-  echo "Found $NUM_ERRORS 'gopls check' errors"
-  exit 1;
-fi